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    [Appendix]
    [Detailed Budget Estimates by Agency]
    [National Aeronautics and Space Administration]
    [From the U.S. Government Publishing Office, www.gpo.gov]

             <h1>NATIONAL AERONAUTICS AND SPACE ADMINISTRATION

             </h1>

          NATIONAL AERONAUTICS AND SPACE ADMINISTRATION

          Federal Funds
             ScienceFor necessary expenses, not otherwise provided for, in the conduct and support of science research and development activities,
                including research, development, operations, support, and services; maintenance and repair, facility planning and design;
                space flight, spacecraft control, and communications activities; program management; personnel and related costs, including
                uniforms or allowances therefor, as authorized by sections 5901 and 5902 of title 5, United States Code; travel expenses;
                purchase and hire of passenger motor vehicles; and purchase, lease, charter, maintenance, and operation of mission and administrative
                aircraft, $5,711,800,000, to remain available until September 30, 2019.
          Note.—A full-year 2017 appropriation for this account was not enacted at the time the budget was prepared; therefore, the
             budget assumes this account is operating under the Further Continuing Appropriations Act, 2017 (P.L. 114–254). The amounts
             included for 2017 reflect the annualized level provided by the continuing resolution.

          Program and Financing (in millions of dollars)

                      Identification code 080–0120–0–1–252
                      2016 actual
                      2017 est.
                      2018 est.

                      Obligations by program activity:

                      0001
                      Science (Direct)
                      5,584
                      5,578
                      5,712

                      Budgetary resources:

                      Unobligated balance:

                      1000
                      Unobligated balance brought forward, Oct 1
                      273
                      300
                      300

                      1021
                      Recoveries of prior year unpaid obligations
                      27

                      1033
                      Recoveries of prior year paid obligations
                      1

                      1050
                      Unobligated balance (total)
                      301
                      300
                      300

                      Budget authority:

                      Appropriations, discretionary:

                      1100
                      Appropriation
                      5,589
                      5,578
                      5,712

                      1120
                      Appropriations transferred to other accts CECR [080–0130]
                      –5

                      1120
                      Appropriations transferred to other acct SSMS [080–0122]
                      –1

                      1160
                      Appropriation, discretionary (total)
                      5,583
                      5,578
                      5,712

                      1930
                      Total budgetary resources available
                      5,884
                      5,878
                      6,012

                      Memorandum (non-add) entries:

                      1941
                      Unexpired unobligated balance, end of year
                      300
                      300
                      300

                      Change in obligated balance:

                      Unpaid obligations:

                      3000
                      Unpaid obligations, brought forward, Oct 1
                      3,253
                      3,622
                      3,849

                      3010
                      New obligations, unexpired accounts
                      5,584
                      5,578
                      5,712

                      3011
                      Obligations ("upward adjustments"), expired accounts
                      3

                      3020
                      Outlays (gross)
                      –5,175
                      –5,351
                      –5,693

                      3040
                      Recoveries of prior year unpaid obligations, unexpired
                      –27

                      3041
                      Recoveries of prior year unpaid obligations, expired
                      –16

                      3050
                      Unpaid obligations, end of year
                      3,622
                      3,849
                      3,868

                      Memorandum (non-add) entries:

                      3100
                      Obligated balance, start of year
                      3,253
                      3,622
                      3,849

                      3200
                      Obligated balance, end of year
                      3,622
                      3,849
                      3,868

                      Budget authority and outlays, net:

                      Discretionary:

                      4000
                      Budget authority, gross
                      5,583
                      5,578
                      5,712

                      Outlays, gross:

                      4010
                      Outlays from new discretionary authority
                      2,190
                      2,345
                      2,401

                      4011
                      Outlays from discretionary balances
                      2,985
                      3,006
                      3,292

                      4020
                      Outlays, gross (total)
                      5,175
                      5,351
                      5,693

                      Offsets against gross budget authority and outlays:

                      Offsetting collections (collected) from:

                      4033
                      Non-Federal sources
                      –1

                      Additional offsets against gross budget authority only:

                      4053
                      Recoveries of prior year paid obligations, unexpired accounts
                      1

                      4060
                      Additional offsets against budget authority only (total)
                      1

                      4070
                      Budget authority, net (discretionary)
                      5,583
                      5,578
                      5,712

                      4080
                      Outlays, net (discretionary)
                      5,174
                      5,351
                      5,693

                      4180
                      Budget authority, net (total)
                      5,583
                      5,578
                      5,712

                      4190
                      Outlays, net (total)
                      5,174
                      5,351
                      5,693

             The Science appropriation provides for NASA's science mission, which is comprised of the agency's Earth and space science
                programs: Earth Science, Planetary Science, Heliophysics, the James Webb Space Telescope, and Astrophysics. These programs,
                which are managed by the Science Mission Directorate, seek to answer fundamental questions concerning the global Earth system;
                other planets in the solar system and around other stars; the connections among the Sun, Earth, and heliosphere; and the origin
                and evolution of planetary systems, the galaxy, and the universe, including the origin and distribution of life in the universe.
                Program objectives are pursued through robotic flight missions, ground-based scientific research and data analysis, and the
                development of new technologies for future missions.

             The Science appropriation provides for all of the research, development, operations, salaries and related expenses, and other
                general and administrative activities required to execute the programs within this account. Costs include labor, travel, procurement,
                and test and fabrication costs. Performance goals associated with these activities are addressed in NASA's detailed budget
                request.

          Object Classification (in millions of dollars)

                      Identification code 080–0120–0–1–252
                      2016 actual
                      2017 est.
                      2018 est.

                      Direct obligations:

                      Personnel compensation:

                      11.1
                      Full-time permanent
                      236
                      236
                      255

                      11.3
                      Other than full-time permanent
                      4
                      4
                      4

                      11.5
                      Other personnel compensation
                      1
                      1
                      2

                      11.9
                      Total personnel compensation
                      241
                      241
                      261

                      12.1
                      Civilian personnel benefits
                      74
                      74
                      80

                      21.0
                      Travel and transportation of persons
                      21
                      21
                      23

                      22.0
                      Transportation of things
                      5
                      5
                      5

                      23.2
                      Rental payments to others
                      6
                      6
                      6

                      23.3
                      Communications, utilities, and miscellaneous charges
                      4
                      4
                      4

                      24.0
                      Printing and reproduction
                      1
                      1
                      1

                      25.1
                      Advisory and assistance services
                      84
                      84
                      78

                      25.2
                      Other services from non-Federal sources
                      197
                      197
                      91

                      25.3
                      Other goods and services from Federal sources
                      223
                      223
                      222

                      25.4
                      Operation and maintenance of facilities
                      9
                      9
                      10

                      25.5
                      Research and development contracts
                      3,910
                      3,905
                      4,059

                      25.7
                      Operation and maintenance of equipment
                      94
                      94
                      99

                      26.0
                      Supplies and materials
                      24
                      24
                      29

                      31.0
                      Equipment
                      35
                      35
                      33

                      41.0
                      Grants, subsidies, and contributions
                      656
                      655
                      711

                      99.9
                      Total new obligations, unexpired accounts
                      5,584
                      5,578
                      5,712

          Employment Summary

                      Identification code 080–0120–0–1–252
                      2016 actual
                      2017 est.
                      2018 est.

                      1001
                      Direct civilian full-time equivalent employment
                      1,897
                      1,835
                      1,887

             AeronauticsFor necessary expenses, not otherwise provided for, in the conduct and support of aeronautics research and development activities,
                including research, development, operations, support, and services; maintenance and repair, facility planning and design;
                space flight, spacecraft control, and communications activities; program management; personnel and related costs, including
                uniforms or allowances therefor, as authorized by sections 5901 and 5902 of title 5, United States Code; travel expenses;
                purchase and hire of passenger motor vehicles; and purchase, lease, charter, maintenance, and operation of mission and administrative
                aircraft, $624,000,000, to remain available until September 30, 2019.
          Note.—A full-year 2017 appropriation for this account was not enacted at the time the budget was prepared; therefore, the
             budget assumes this account is operating under the Further Continuing Appropriations Act, 2017 (P.L. 114–254). The amounts
             included for 2017 reflect the annualized level provided by the continuing resolution.

          Program and Financing (in millions of dollars)

                      Identification code 080–0126–0–1–402
                      2016 actual
                      2017 est.
                      2018 est.

                      Obligations by program activity:

                      0001
                      Aeronautics (Direct)
                      644
                      639
                      624

                      Budgetary resources:

                      Unobligated balance:

                      1000
                      Unobligated balance brought forward, Oct 1
                      12
                      12
                      12

                      1021
                      Recoveries of prior year unpaid obligations
                      10

                      1050
                      Unobligated balance (total)
                      22
                      12
                      12

                      Budget authority:

                      Appropriations, discretionary:

                      1100
                      Appropriation
                      640
                      639
                      624

                      1120
                      Appropriations transferred to other acct [080–0130]
                      –5

                      1120
                      Appropriations transferred to other acct SSMS [080–0122]
                      –1

                      1160
                      Appropriation, discretionary (total)
                      634
                      639
                      624

                      1930
                      Total budgetary resources available
                      656
                      651
                      636

                      Memorandum (non-add) entries:

                      1941
                      Unexpired unobligated balance, end of year
                      12
                      12
                      12

                      Change in obligated balance:

                      Unpaid obligations:

                      3000
                      Unpaid obligations, brought forward, Oct 1
                      322
                      345
                      382

                      3010
                      New obligations, unexpired accounts
                      644
                      639
                      624

                      3011
                      Obligations ("upward adjustments"), expired accounts
                      1

                      3020
                      Outlays (gross)
                      –609
                      –602
                      –633

                      3040
                      Recoveries of prior year unpaid obligations, unexpired
                      –10

                      3041
                      Recoveries of prior year unpaid obligations, expired
                      –3

                      3050
                      Unpaid obligations, end of year
                      345
                      382
                      373

                      Memorandum (non-add) entries:

                      3100
                      Obligated balance, start of year
                      322
                      345
                      382

                      3200
                      Obligated balance, end of year
                      345
                      382
                      373

                      Budget authority and outlays, net:

                      Discretionary:

                      4000
                      Budget authority, gross
                      634
                      639
                      624

                      Outlays, gross:

                      4010
                      Outlays from new discretionary authority
                      352
                      313
                      305

                      4011
                      Outlays from discretionary balances
                      257
                      289
                      328

                      4020
                      Outlays, gross (total)
                      609
                      602
                      633

                      4180
                      Budget authority, net (total)
                      634
                      639
                      624

                      4190
                      Outlays, net (total)
                      609
                      602
                      633

             This appropriation provides for the full costs associated with NASA's Aeronautics Research mission, which aims to expand the
                boundaries of aeronautical knowledge for the benefit of the nation and the broad aeronautics community. The mission is managed
                by NASA's Aeronautics Research Mission Directorate, and consists of the following integrated research programs: Airspace Operations
                and Safety, Advanced Air Vehicles, Integrated Aviation Systems, and Transformative Aeronautics Concepts. Full costs of these
                programs cover all of the research; development; operations; salaries and related expenses; and other general and administrative
                activities required to execute the programs. Costs include labor, travel, procurement, test, and fabrication costs. Performance
                goals associated with these activities are addressed in NASA's detailed budget request.

          Object Classification (in millions of dollars)

                      Identification code 080–0126–0–1–402
                      2016 actual
                      2017 est.
                      2018 est.

                      Direct obligations:

                      Personnel compensation:

                      11.1
                      Full-time permanent
                      152
                      152
                      171

                      11.3
                      Other than full-time permanent
                      3
                      3
                      3

                      11.9
                      Total personnel compensation
                      155
                      155
                      174

                      12.1
                      Civilian personnel benefits
                      46
                      47
                      53

                      21.0
                      Travel and transportation of persons
                      7
                      5
                      5

                      22.0
                      Transportation of things
                      1

                      23.3
                      Communications, utilities, and miscellaneous charges
                      3
                      5
                      4

                      25.1
                      Advisory and assistance services
                      11
                      11
                      11

                      25.2
                      Other services from non-Federal sources
                      30
                      48
                      39

                      25.3
                      Other goods and services from Federal sources
                      8
                      5
                      6

                      25.4
                      Operation and maintenance of facilities
                      33
                      26
                      17

                      25.5
                      Research and development contracts
                      223
                      230
                      215

                      25.7
                      Operation and maintenance of equipment
                      36
                      37
                      33

                      26.0
                      Supplies and materials
                      14
                      15
                      11

                      31.0
                      Equipment
                      31
                      30
                      25

                      32.0
                      Land and structures
                      2
                      1
                      1

                      41.0
                      Grants, subsidies, and contributions
                      44
                      24
                      30

                      99.9
                      Total new obligations, unexpired accounts
                      644
                      639
                      624

          Employment Summary

                      Identification code 080–0126–0–1–402
                      2016 actual
                      2017 est.
                      2018 est.

                      1001
                      Direct civilian full-time equivalent employment
                      1,310
                      1,345
                      1,345

             Space TechnologyFor necessary expenses, not otherwise provided for, in the conduct and support of space technology research and development
                activities, including research, development, operations, support, and services; maintenance and repair, facility planning
                and design; space flight, spacecraft control, and communications activities; program management; personnel and related costs,
                including uniforms or allowances therefor, as authorized by sections 5901 and 5902 of title 5, United States Code; travel
                expenses; purchase and hire of passenger motor vehicles; and purchase, lease, charter, maintenance, and operation of mission
                and administrative aircraft, $678,600,000, to remain available until September 30, 2019.
          Note.—A full-year 2017 appropriation for this account was not enacted at the time the budget was prepared; therefore, the
             budget assumes this account is operating under the Further Continuing Appropriations Act, 2017 (P.L. 114–254). The amounts
             included for 2017 reflect the annualized level provided by the continuing resolution.

          Program and Financing (in millions of dollars)

                      Identification code 080–0131–0–1–252
                      2016 actual
                      2017 est.
                      2018 est.

                      Obligations by program activity:

                      0001
                      Space Technology (Direct)
                      677
                      686
                      679

                      Budgetary resources:

                      Unobligated balance:

                      1000
                      Unobligated balance brought forward, Oct 1
                      49
                      71
                      71

                      1011
                      Unobligated balance transfer from other acct SSMS [080–0122]
                      4

                      1021
                      Recoveries of prior year unpaid obligations
                      8

                      1050
                      Unobligated balance (total)
                      61
                      71
                      71

                      Budget authority:

                      Appropriations, discretionary:

                      1100
                      Appropriation
                      687
                      686
                      679

                      1930
                      Total budgetary resources available
                      748
                      757
                      750

                      Memorandum (non-add) entries:

                      1941
                      Unexpired unobligated balance, end of year
                      71
                      71
                      71

                      Change in obligated balance:

                      Unpaid obligations:

                      3000
                      Unpaid obligations, brought forward, Oct 1
                      378
                      486
                      498

                      3010
                      New obligations, unexpired accounts
                      677
                      686
                      679

                      3011
                      Obligations ("upward adjustments"), expired accounts
                      1

                      3020
                      Outlays (gross)
                      –560
                      –674
                      –684

                      3040
                      Recoveries of prior year unpaid obligations, unexpired
                      –8

                      3041
                      Recoveries of prior year unpaid obligations, expired
                      –2

                      3050
                      Unpaid obligations, end of year
                      486
                      498
                      493

                      Memorandum (non-add) entries:

                      3100
                      Obligated balance, start of year
                      378
                      486
                      498

                      3200
                      Obligated balance, end of year
                      486
                      498
                      493

                      Budget authority and outlays, net:

                      Discretionary:

                      4000
                      Budget authority, gross
                      687
                      686
                      679

                      Outlays, gross:

                      4010
                      Outlays from new discretionary authority
                      248
                      240
                      238

                      4011
                      Outlays from discretionary balances
                      312
                      434
                      446

                      4020
                      Outlays, gross (total)
                      560
                      674
                      684

                      4180
                      Budget authority, net (total)
                      687
                      686
                      679

                      4190
                      Outlays, net (total)
                      560
                      674
                      684

             This appropriation provides for the full costs associated with program activities under the NASA Space Technology Mission
                Directorate which conducts research and development in space technologies serving multiple customers within NASA, private
                industry, academia, and other government agencies. The full costs provide for all of the research; development; operations;
                salaries and related expenses; and other general and administrative activities required to execute the programs within this
                account. Costs include labor, travel, procurement, and those associated with fabrication, tests and flight demonstrations.
                The Space Technology appropriation also supports the operations of the NASA Office of the Chief Technologist.

             The programs within Space Technology enable new missions by drawing on talent from the NASA workforce, academia, small businesses
                and the broader space enterprise to deliver innovative solutions that dramatically improve technological capabilities for
                NASA and the Nation. The appropriation funds several programs, including Agency Technology and Innovation, Small Business
                Innovative Research (SBIR), Small Business Technology Transfer (STTR), and Space Technology Research and Development. Performance
                goals associated with these activities are addressed in NASA's detailed budget request.

          Object Classification (in millions of dollars)

                      Identification code 080–0131–0–1–252
                      2016 actual
                      2017 est.
                      2018 est.

                      Direct obligations:

                      Personnel compensation:

                      11.1
                      Full-time permanent
                      83
                      86
                      95

                      11.3
                      Other than full-time permanent
                      1
                      1
                      1

                      11.9
                      Total personnel compensation
                      84
                      87
                      96

                      12.1
                      Civilian personnel benefits
                      27
                      27
                      30

                      21.0
                      Travel and transportation of persons
                      4
                      4
                      5

                      22.0
                      Transportation of things
                      1
                      1
                      4

                      25.1
                      Advisory and assistance services
                      27
                      27
                      30

                      25.2
                      Other services from non-Federal sources
                      30
                      30
                      27

                      25.3
                      Other goods and services from Federal sources
                      5
                      6
                      9

                      25.4
                      Operation and maintenance of facilities
                      2
                      3
                      3

                      25.5
                      Research and development contracts
                      432
                      435
                      404

                      25.7
                      Operation and maintenance of equipment
                      18
                      18
                      14

                      26.0
                      Supplies and materials
                      5
                      5
                      7

                      31.0
                      Equipment
                      4
                      4
                      9

                      41.0
                      Grants, subsidies, and contributions
                      38
                      39
                      41

                      99.9
                      Total new obligations, unexpired accounts
                      677
                      686
                      679

          Employment Summary

                      Identification code 080–0131–0–1–252
                      2016 actual
                      2017 est.
                      2018 est.

                      1001
                      Direct civilian full-time equivalent employment
                      705
                      722
                      725

             explorationFor necessary expenses, not otherwise provided for, in the conduct and support of exploration research and development activities,
                including research, development, operations, support, and services; maintenance and repair, facility planning and design;
                space flight, spacecraft control, and communications activities; program management; personnel and related costs, including
                uniforms or allowances therefor, as authorized by sections 5901 and 5902 of title 5, United States Code; travel expenses;
                purchase and hire of passenger motor vehicles; and purchase, lease, charter, maintenance, and operation of mission and administrative
                aircraft, $3,934,097,000, to remain available until September 30, 2019.
          Note.—A full-year 2017 appropriation for this account was not enacted at the time the budget was prepared; therefore, the
             budget assumes this account is operating under the Further Continuing Appropriations Act, 2017 (P.L. 114–254). The amounts
             included for 2017 reflect the annualized level provided by the continuing resolution.

          Program and Financing (in millions of dollars)

                      Identification code 080–0124–0–1–252
                      2016 actual
                      2017 est.
                      2018 est.

                      Obligations by program activity:

                      0001
                      Exploration (Direct)
                      4,046
                      4,022
                      3,934

                      Budgetary resources:

                      Unobligated balance:

                      1000
                      Unobligated balance brought forward, Oct 1
                      58
                      43
                      43

                      1010
                      Unobligated balance transfer to other accts CECR [080–0130]
                      –19

                      1021
                      Recoveries of prior year unpaid obligations
                      36

                      1050
                      Unobligated balance (total)
                      75
                      43
                      43

                      Budget authority:

                      Appropriations, discretionary:

                      1100
                      Appropriation
                      4,030
                      4,022
                      3,934

                      1120
                      Appropriations transferred to other acct CECR [080–0130]
                      –18

                      1120
                      Appropriations transferred to other acct SSMS [080–0122]
                      –2

                      1121
                      Appropriations transferred from other acct SOMD [080–0115]
                      4

                      1160
                      Appropriation, discretionary (total)
                      4,014
                      4,022
                      3,934

                      1930
                      Total budgetary resources available
                      4,089
                      4,065
                      3,977

                      Memorandum (non-add) entries:

                      1941
                      Unexpired unobligated balance, end of year
                      43
                      43
                      43

                      Change in obligated balance:

                      Unpaid obligations:

                      3000
                      Unpaid obligations, brought forward, Oct 1
                      1,501
                      1,270
                      1,457

                      3010
                      New obligations, unexpired accounts
                      4,046
                      4,022
                      3,934

                      3011
                      Obligations ("upward adjustments"), expired accounts
                      2

                      3020
                      Outlays (gross)
                      –4,237
                      –3,835
                      –3,934

                      3040
                      Recoveries of prior year unpaid obligations, unexpired
                      –36

                      3041
                      Recoveries of prior year unpaid obligations, expired
                      –6

                      3050
                      Unpaid obligations, end of year
                      1,270
                      1,457
                      1,457

                      Memorandum (non-add) entries:

                      3100
                      Obligated balance, start of year
                      1,501
                      1,270
                      1,457

                      3200
                      Obligated balance, end of year
                      1,270
                      1,457
                      1,457

                      Budget authority and outlays, net:

                      Discretionary:

                      4000
                      Budget authority, gross
                      4,014
                      4,022
                      3,934

                      Outlays, gross:

                      4010
                      Outlays from new discretionary authority
                      2,757
                      2,735
                      2,557

                      4011
                      Outlays from discretionary balances
                      1,480
                      1,100
                      1,377

                      4020
                      Outlays, gross (total)
                      4,237
                      3,835
                      3,934

                      4180
                      Budget authority, net (total)
                      4,014
                      4,022
                      3,934

                      4190
                      Outlays, net (total)
                      4,237
                      3,835
                      3,934

             This appropriation provides for costs associated with the development of systems and capabilities required for human exploration
                of space. The systems and capabilities include launch and crew vehicles for missions beyond low Earth orbit, technologies
                and countermeasures to keep astronauts healthy and functional during deep space missions, and technologies to increase capabilities,
                and reduce the launch mass and cost of deep space missions. The full costs provide for the research; development; operations;
                salaries and related expenses; and other general and administrative activities required to execute the programs within this
                account. Costs include labor, travel, procurement, test and fabrication costs. Performance goals associated with these activities
                are addressed in NASA's detailed budget request.

             NASA's human space exploration programs include Space Launch System, Orion, Exploration Ground Systems, Advanced Exploration
                Systems, and Human Research. The programs are managed by NASA's Human Exploration and Operations Mission Directorate, which
                also manages programs in the Space Operations account.

          Object Classification (in millions of dollars)

                      Identification code 080–0124–0–1–252
                      2016 actual
                      2017 est.
                      2018 est.

                      Direct obligations:

                      Personnel compensation:

                      11.1
                      Full-time permanent
                      323
                      323
                      337

                      11.3
                      Other than full-time permanent
                      2
                      2
                      2

                      11.5
                      Other personnel compensation
                      1
                      1
                      1

                      11.8
                      Special personal services payments
                      1
                      1
                      1

                      11.9
                      Total personnel compensation
                      327
                      327
                      341

                      12.1
                      Civilian personnel benefits
                      104
                      104
                      109

                      13.0
                      Benefits for former personnel
                      1
                      1

                      21.0
                      Travel and transportation of persons
                      14
                      14
                      13

                      22.0
                      Transportation of things
                      1
                      1
                      25

                      23.3
                      Communications, utilities, and miscellaneous charges
                      10
                      10
                      6

                      25.1
                      Advisory and assistance services
                      397
                      397
                      341

                      25.2
                      Other services from non-Federal sources
                      40
                      40
                      34

                      25.3
                      Other goods and services from Federal sources
                      40
                      40
                      34

                      25.4
                      Operation and maintenance of facilities
                      102
                      102
                      95

                      25.5
                      Research and development contracts
                      2,703
                      2,679
                      2,663

                      25.7
                      Operation and maintenance of equipment
                      149
                      149
                      134

                      26.0
                      Supplies and materials
                      19
                      19
                      19

                      31.0
                      Equipment
                      40
                      40
                      45

                      32.0
                      Land and structures
                      38
                      38
                      19

                      41.0
                      Grants, subsidies, and contributions
                      61
                      61
                      56

                      99.9
                      Total new obligations, unexpired accounts
                      4,046
                      4,022
                      3,934

          Employment Summary

                      Identification code 080–0124–0–1–252
                      2016 actual
                      2017 est.
                      2018 est.

                      1001
                      Direct civilian full-time equivalent employment
                      2,758
                      2,713
                      2,651

             EducationFor necessary expenses, not otherwise provided for, in the conduct and support of aerospace and aeronautical education research
                and development activities, including research, development, operations, support, and services; program management; personnel
                and related costs, including uniforms or allowances therefor, as authorized by sections 5901 and 5902 of title 5, United States
                Code; travel expenses; purchase and hire of passenger motor vehicles;  purchase, lease, charter, maintenance, and operation of mission and administrative aircraft; and to carry out closure of the NASA Office of Education, including for making payments for awards granted prior to September
                   30, 2017,  $37,300,000, to remain available until September 30, 2019.
          Note.—A full-year 2017 appropriation for this account was not enacted at the time the budget was prepared; therefore, the
             budget assumes this account is operating under the Further Continuing Appropriations Act, 2017 (P.L. 114–254). The amounts
             included for 2017 reflect the annualized level provided by the continuing resolution.

          Program and Financing (in millions of dollars)

                      Identification code 080–0128–0–1–252
                      2016 actual
                      2017 est.
                      2018 est.

                      Obligations by program activity:

                      0001
                      Education (Direct)
                      137
                      115
                      37

                      Budgetary resources:

                      Unobligated balance:

                      1000
                      Unobligated balance brought forward, Oct 1
                      33
                      12
                      12

                      1021
                      Recoveries of prior year unpaid obligations
                      1

                      1050
                      Unobligated balance (total)
                      34
                      12
                      12

                      Budget authority:

                      Appropriations, discretionary:

                      1100
                      Appropriation
                      115
                      115
                      37

                      1930
                      Total budgetary resources available
                      149
                      127
                      49

                      Memorandum (non-add) entries:

                      1941
                      Unexpired unobligated balance, end of year
                      12
                      12
                      12

                      Change in obligated balance:

                      Unpaid obligations:

                      3000
                      Unpaid obligations, brought forward, Oct 1
                      159
                      179
                      129

                      3010
                      New obligations, unexpired accounts
                      137
                      115
                      37

                      3020
                      Outlays (gross)
                      –114
                      –165
                      –100

                      3040
                      Recoveries of prior year unpaid obligations, unexpired
                      –1

                      3041
                      Recoveries of prior year unpaid obligations, expired
                      –2

                      3050
                      Unpaid obligations, end of year
                      179
                      129
                      66

                      Memorandum (non-add) entries:

                      3100
                      Obligated balance, start of year
                      159
                      179
                      129

                      3200
                      Obligated balance, end of year
                      179
                      129
                      66

                      Budget authority and outlays, net:

                      Discretionary:

                      4000
                      Budget authority, gross
                      115
                      115
                      37

                      Outlays, gross:

                      4010
                      Outlays from new discretionary authority
                      14
                      24
                      8

                      4011
                      Outlays from discretionary balances
                      100
                      141
                      92

                      4020
                      Outlays, gross (total)
                      114
                      165
                      100

                      4180
                      Budget authority, net (total)
                      115
                      115
                      37

                      4190
                      Outlays, net (total)
                      114
                      165
                      100

             This appropriation provides for the full costs associated with NASA's education activities within the Office of Education,
                which include labor, travel, procurement, test and fabrication costs. The Budget proposes the termination of the Office of
                Education and its portfolio of programs and projects. The Office of Education has experienced significant challenges in implementing
                a focused NASA-wide education strategy. Additionally, the Office of Education lacks sufficient outcome measures to assess
                the effectiveness of its programs.

             The Budget supports the orderly closeout and/or transition of these activities needed to comply with federal laws and regulations
                regarding contracts, grants/cooperative agreements, civil servants, records management, and administrative infrastructure.

             While the Budget no longer supports the formal Office of Education programs, NASA will continue to use every opportunity to
                support the next generation through engagement in our missions and the many ways that our work excites and encourages discovery
                by learners and educators.

          Object Classification (in millions of dollars)

                      Identification code 080–0128–0–1–252
                      2016 actual
                      2017 est.
                      2018 est.

                      Direct obligations:

                      Personnel compensation:

                      11.1
                      Full-time permanent
                      5
                      5
                      4

                      11.8
                      Special personal services payments
                      1
                      1

                      11.9
                      Total personnel compensation
                      6
                      6
                      4

                      12.1
                      Civilian personnel benefits
                      2
                      2
                      1

                      25.1
                      Advisory and assistance services
                      7
                      5
                      2

                      25.2
                      Other services from non-Federal sources
                      10
                      9
                      3

                      25.5
                      Research and development contracts
                      3
                      2
                      1

                      25.7
                      Operation and maintenance of equipment
                      6
                      4
                      1

                      41.0
                      Grants, subsidies, and contributions
                      103
                      87
                      25

                      99.9
                      Total new obligations, unexpired accounts
                      137
                      115
                      37

          Employment Summary

                      Identification code 080–0128–0–1–252
                      2016 actual
                      2017 est.
                      2018 est.

                      1001
                      Direct civilian full-time equivalent employment
                      51
                      60
                      30

             Safety, security and mission servicesFor necessary expenses, not otherwise provided for, in the conduct and support of science, aeronautics, space technology,
                exploration, space operations and education research and development activities, including research, development, operations,
                support, and services; maintenance and repair, facility planning and design; space flight, spacecraft control, and communications
                activities; program management; personnel and related costs, including uniforms or allowances therefor, as authorized by sections
                5901 and 5902 of title 5, United States Code; travel expenses; purchase and hire of passenger motor vehicles; not to exceed
                $63,000 for official reception and representation expenses; and purchase, lease, charter, maintenance, and operation of mission
                and administrative aircraft, $2,830,200,000, to remain available until September 30, 2019.
          Note.—A full-year 2017 appropriation for this account was not enacted at the time the budget was prepared; therefore, the
             budget assumes this account is operating under the Further Continuing Appropriations Act, 2017 (P.L. 114–254). The amounts
             included for 2017 reflect the annualized level provided by the continuing resolution.

          Program and Financing (in millions of dollars)

                      Identification code 080–0122–0–1–252
                      2016 actual
                      2017 est.
                      2018 est.

                      Obligations by program activity:

                      0001
                      Cross Agency Support (Direct)
                      2,800
                      2,764
                      2,830

                      0801
                      Cross Agency Support (Reimbursable)
                      2,525
                      2,726
                      2,548

                      0900
                      Total new obligations, unexpired accounts
                      5,325
                      5,490
                      5,378

                      Budgetary resources:

                      Unobligated balance:

                      1000
                      Unobligated balance brought forward, Oct 1
                      247
                      304
                      304

                      1010
                      Unobligated balance transfer to other accts Space Technology [080–0131]
                      –4

                      1021
                      Recoveries of prior year unpaid obligations
                      28

                      1033
                      Recoveries of prior year paid obligations
                      2

                      1050
                      Unobligated balance (total)
                      273
                      304
                      304

                      Budget authority:

                      Appropriations, discretionary:

                      1100
                      Appropriation
                      2,769
                      2,764
                      2,830

                      1121
                      Appropriations transferred from other acct Science [080–0120]
                      1

                      1121
                      Appropriations transferred from other acct Aeronautics [080–0126]
                      1

                      1121
                      Appropriations transferred from other acct Exploration [080–0124]
                      2

                      1160
                      Appropriation, discretionary (total)
                      2,773
                      2,764
                      2,830

                      Spending authority from offsetting collections, discretionary:

                      1700
                      Collected
                      2,197
                      2,726
                      2,548

                      1701
                      Change in uncollected payments, Federal sources
                      386

                      1750
                      Spending auth from offsetting collections, disc (total)
                      2,583
                      2,726
                      2,548

                      1900
                      Budget authority (total)
                      5,356
                      5,490
                      5,378

                      1930
                      Total budgetary resources available
                      5,629
                      5,794
                      5,682

                      Memorandum (non-add) entries:

                      1941
                      Unexpired unobligated balance, end of year
                      304
                      304
                      304

                      Change in obligated balance:

                      Unpaid obligations:

                      3000
                      Unpaid obligations, brought forward, Oct 1
                      1,859
                      2,227
                      1,909

                      3010
                      New obligations, unexpired accounts
                      5,325
                      5,490
                      5,378

                      3011
                      Obligations ("upward adjustments"), expired accounts
                      10

                      3020
                      Outlays (gross)
                      –4,922
                      –5,808
                      –5,528

                      3040
                      Recoveries of prior year unpaid obligations, unexpired
                      –28

                      3041
                      Recoveries of prior year unpaid obligations, expired
                      –17

                      3050
                      Unpaid obligations, end of year
                      2,227
                      1,909
                      1,759

                      Uncollected payments:

                      3060
                      Uncollected pymts, Fed sources, brought forward, Oct 1
                      –1,105
                      –1,443
                      –1,443

                      3070
                      Change in uncollected pymts, Fed sources, unexpired
                      –386

                      3071
                      Change in uncollected pymts, Fed sources, expired
                      48

                      3090
                      Uncollected pymts, Fed sources, end of year
                      –1,443
                      –1,443
                      –1,443

                      Memorandum (non-add) entries:

                      3100
                      Obligated balance, start of year
                      754
                      784
                      466

                      3200
                      Obligated balance, end of year
                      784
                      466
                      316

                      Budget authority and outlays, net:

                      Discretionary:

                      4000
                      Budget authority, gross
                      5,356
                      5,490
                      5,378

                      Outlays, gross:

                      4010
                      Outlays from new discretionary authority
                      3,089
                      4,392
                      4,302

                      4011
                      Outlays from discretionary balances
                      1,833
                      1,416
                      1,226

                      4020
                      Outlays, gross (total)
                      4,922
                      5,808
                      5,528

                      Offsets against gross budget authority and outlays:

                      Offsetting collections (collected) from:

                      4030
                      Federal sources
                      –2,024
                      –2,475
                      –2,295

                      4033
                      Non-Federal sources
                      –226
                      –251
                      –253

                      4040
                      Offsets against gross budget authority  and outlays (total)
                      –2,250
                      –2,726
                      –2,548

                      Additional offsets against gross budget authority only:

                      4050
                      Change in uncollected pymts, Fed sources, unexpired
                      –386

                      4052
                      Offsetting collections credited to expired accounts
                      51

                      4053
                      Recoveries of prior year paid obligations, unexpired accounts
                      2

                      4060
                      Additional offsets against budget authority only (total)
                      –333

                      4070
                      Budget authority, net (discretionary)
                      2,773
                      2,764
                      2,830

                      4080
                      Outlays, net (discretionary)
                      2,672
                      3,082
                      2,980

                      4180
                      Budget authority, net (total)
                      2,773
                      2,764
                      2,830

                      4190
                      Outlays, net (total)
                      2,672
                      3,082
                      2,980

             This appropriation provides for NASA's supporting functions associated with the science, aeronautics, space technology, education,
                space operations, exploration, and construction and environmental compliance and restoration activities of the agency. This
                account provides for the operations and maintenance; salaries and related expenses; and other general and administrative activities
                supporting the programs within the Agency's six mission accounts.

             Safety, Security, and Mission Services provides a strategic focus for managing agency mission support functions and some of
                NASA's unique research facilities.

             Center Management and Operations includes the basic costs to manage and operate each of the nine NASA field centers and to
                maintain the technical capabilities required to support the Agency's Mission. This Budget is not directly identified or aligned
                to a specific program or project requirement, but is necessary for efficient and effective administration and operation of
                the NASA Centers.

             Agency Management and Operations provides for the management and oversight of Agency programs, the performance of Agency-wide
                activities and functions, and the maintenance of unique research capabilities and facilities. Responsibilities include the
                determination of programs and projects; establishment of management policies, procedures, and performance criteria; evaluation
                of progress; and the coordination and integration of all phases of the Agency's mission.

          Object Classification (in millions of dollars)

                      Identification code 080–0122–0–1–252
                      2016 actual
                      2017 est.
                      2018 est.

                      Direct obligations:

                      Personnel compensation:

                      11.1
                      Full-time permanent
                      879
                      866
                      994

                      11.3
                      Other than full-time permanent
                      18
                      18
                      20

                      11.5
                      Other personnel compensation
                      26
                      26
                      29

                      11.8
                      Special personal services payments

                      1

                      11.9
                      Total personnel compensation
                      923
                      910
                      1,044

                      12.1
                      Civilian personnel benefits
                      277
                      273
                      314

                      13.0
                      Benefits for former personnel
                      1
                      1
                      1

                      21.0
                      Travel and transportation of persons
                      22
                      22
                      20

                      22.0
                      Transportation of things
                      2
                      2
                      3

                      23.1
                      Rental payments to GSA
                      7
                      7
                      7

                      23.2
                      Rental payments to others
                      24
                      24
                      20

                      23.3
                      Communications, utilities, and miscellaneous charges
                      59
                      58
                      58

                      24.0
                      Printing and reproduction
                      3
                      3
                      3

                      25.1
                      Advisory and assistance services
                      221
                      218
                      203

                      25.2
                      Other services from non-Federal sources
                      258
                      255
                      236

                      25.3
                      Other goods and services from Federal sources
                      50
                      49
                      45

                      25.4
                      Operation and maintenance of facilities
                      252
                      249
                      232

                      25.5
                      Research and development contracts
                      181
                      179
                      155

                      25.6
                      Medical care
                      8
                      8
                      7

                      25.7
                      Operation and maintenance of equipment
                      416
                      411
                      394

                      26.0
                      Supplies and materials
                      14
                      14
                      14

                      31.0
                      Equipment
                      41
                      40
                      37

                      32.0
                      Land and structures
                      25
                      25
                      22

                      41.0
                      Grants, subsidies, and contributions
                      16
                      16
                      15

                      99.0
                      Direct obligations
                      2,800
                      2,764
                      2,830

                      99.0
                      Reimbursable obligations
                      2,525
                      2,726
                      2,548

                      99.9
                      Total new obligations, unexpired accounts
                      5,325
                      5,490
                      5,378

          Employment Summary

                      Identification code 080–0122–0–1–252
                      2016 actual
                      2017 est.
                      2018 est.

                      1001
                      Direct civilian full-time equivalent employment
                      7,437
                      7,688
                      7,705

                      2001
                      Reimbursable civilian full-time equivalent employment
                      342
                      317
                      263

             construction and environmental compliance and restorationFor necessary expenses for construction of facilities including repair, rehabilitation, revitalization, and modification of
                facilities, construction of new facilities and additions to existing facilities, facility planning and design, and restoration,
                and acquisition or condemnation of real property, as authorized by law, and environmental compliance and restoration, $496,100,000, to remain available until September 30, 2023: Provided, That proceeds from leases deposited into this account shall be available for a period of 5 years  to the extent and in amounts as provided in annual appropriations Acts: Provided further, That such proceeds referred to in the preceding proviso shall be available for obligation for fiscal year 2018 in an amount not to exceed $9,470,300: Provided further, That each annual budget request shall include an annual estimate of gross receipts and collections and proposed use of all
                funds collected pursuant to section 20145 of title 51, United States Code.
          Note.—A full-year 2017 appropriation for this account was not enacted at the time the budget was prepared; therefore, the
             budget assumes this account is operating under the Further Continuing Appropriations Act, 2017 (P.L. 114–254). The amounts
             included for 2017 reflect the annualized level provided by the continuing resolution.

          Program and Financing (in millions of dollars)

                      Identification code 080–0130–0–1–252
                      2016 actual
                      2017 est.
                      2018 est.

                      Obligations by program activity:

                      0001
                      Construction and Environmental Compliance and Restoration (Direct)
                      508
                      463
                      496

                      0801
                      Construction and Environmental Compliance and Restoration (Reimbursable)
                      5
                      9
                      9

                      0900
                      Total new obligations, unexpired accounts
                      513
                      472
                      505

                      Budgetary resources:

                      Unobligated balance:

                      1000
                      Unobligated balance brought forward, Oct 1
                      162
                      135
                      135

                      1011
                      Unobligated balance transfer from other acct Exploration [080–0124]
                      19

                      1021
                      Recoveries of prior year unpaid obligations
                      33

                      1050
                      Unobligated balance (total)
                      214
                      135
                      135

                      Budget authority:

                      Appropriations, discretionary:

                      1100
                      Appropriation
                      389
                      463
                      496

                      1121
                      Appropriations transferred from other acct Space Operations [080–0115]
                      11

                      1121
                      Appropriations transferred from other acct Aeronautics [080–0126]
                      5

                      1121
                      Appropriations transferred from other acct Science [080–0120]
                      5

                      1121
                      Appropriations transferred from other acct Exploration [080–0124]
                      18

                      1160
                      Appropriation, discretionary (total)
                      428
                      463
                      496

                      Spending authority from offsetting collections, discretionary:

                      1700
                      Collected
                      6
                      9
                      9

                      1900
                      Budget authority (total)
                      434
                      472
                      505

                      1930
                      Total budgetary resources available
                      648
                      607
                      640

                      Memorandum (non-add) entries:

                      1941
                      Unexpired unobligated balance, end of year
                      135
                      135
                      135

                      Change in obligated balance:

                      Unpaid obligations:

                      3000
                      Unpaid obligations, brought forward, Oct 1
                      734
                      719
                      728

                      3010
                      New obligations, unexpired accounts
                      513
                      472
                      505

                      3020
                      Outlays (gross)
                      –495
                      –463
                      –583

                      3040
                      Recoveries of prior year unpaid obligations, unexpired
                      –33

                      3050
                      Unpaid obligations, end of year
                      719
                      728
                      650

                      Memorandum (non-add) entries:

                      3100
                      Obligated balance, start of year
                      734
                      719
                      728

                      3200
                      Obligated balance, end of year
                      719
                      728
                      650

                      Budget authority and outlays, net:

                      Discretionary:

                      4000
                      Budget authority, gross
                      434
                      472
                      505

                      Outlays, gross:

                      4010
                      Outlays from new discretionary authority
                      20
                      98
                      76

                      4011
                      Outlays from discretionary balances
                      475
                      365
                      507

                      4020
                      Outlays, gross (total)
                      495
                      463
                      583

                      Offsets against gross budget authority and outlays:

                      Offsetting collections (collected) from:

                      4033
                      Non-Federal sources
                      –6
                      –9
                      –9

                      4180
                      Budget authority, net (total)
                      428
                      463
                      496

                      4190
                      Outlays, net (total)
                      489
                      454
                      574

             This appropriation provides for NASA's construction and environmental compliance and restoration activities, and allows the
                agency to use the net proceeds from Enhanced Use Leases for maintenance, capital revitalization, and improvement of real property
                assets and related personal property at NASA Centers under the authority of section 20145 of the National Aeronautics and
                Space Act (51 U.S.C. 20145). The costs provide for all of the research; development; operations; design, repair, rehabilitation,
                modification of facilities, and construction of new facilities; and other general and administrative activities required to
                execute the programs within this account.

          Object Classification (in millions of dollars)

                      Identification code 080–0130–0–1–252
                      2016 actual
                      2017 est.
                      2018 est.

                      Direct obligations:

                      23.3
                      Communications, utilities, and miscellaneous charges
                      1
                      1
                      1

                      25.1
                      Advisory and assistance services
                      34
                      31
                      35

                      25.2
                      Other services from non-Federal sources
                      33
                      30
                      32

                      25.3
                      Other goods and services from Federal sources
                      29
                      26
                      51

                      25.4
                      Operation and maintenance of facilities
                      102
                      93
                      84

                      25.5
                      Research and development contracts
                      32
                      29
                      20

                      25.7
                      Operation and maintenance of equipment
                      10
                      9
                      7

                      26.0
                      Supplies and materials

                      1

                      31.0
                      Equipment

                      1

                      32.0
                      Land and structures
                      267
                      244
                      264

                      99.0
                      Direct obligations
                      508
                      463
                      496

                      99.0
                      Reimbursable obligations
                      5
                      9
                      9

                      99.9
                      Total new obligations, unexpired accounts
                      513
                      472
                      505

             Space operationsFor necessary expenses, not otherwise provided for, in the conduct and support of space operations research and development
                activities, including research, development, operations, support and services; space flight, spacecraft control and communications
                activities, including operations, production, and services; maintenance and repair, facility planning and design; program
                management; personnel and related costs, including uniforms or allowances therefor, as authorized by sections 5901 and 5902
                of title 5, United States Code; travel expenses; purchase and hire of passenger motor vehicles; and purchase, lease, charter,
                maintenance and operation of mission and administrative aircraft, $4,740,803,000, to remain available until September 30, 2019.
          Note.—A full-year 2017 appropriation for this account was not enacted at the time the budget was prepared; therefore, the
             budget assumes this account is operating under the Further Continuing Appropriations Act, 2017 (P.L. 114–254). The amounts
             included for 2017 reflect the annualized level provided by the continuing resolution.

          Program and Financing (in millions of dollars)

                      Identification code 080–0115–0–1–252
                      2016 actual
                      2017 est.
                      2018 est.

                      Obligations by program activity:

                      0001
                      Space Operations (Direct)
                      5,104
                      5,019
                      4,741

                      Budgetary resources:

                      Unobligated balance:

                      1000
                      Unobligated balance brought forward, Oct 1
                      169
                      103
                      103

                      1021
                      Recoveries of prior year unpaid obligations
                      24

                      1050
                      Unobligated balance (total)
                      193
                      103
                      103

                      Budget authority:

                      Appropriations, discretionary:

                      1100
                      Appropriation
                      5,029
                      5,019
                      4,741

                      1120
                      Appropriations transferred to other accts CECR [080–0130]
                      –11

                      1120
                      Appropriations transferred to other acct Exploration [080–0124]
                      –4

                      1160
                      Appropriation, discretionary (total)
                      5,014
                      5,019
                      4,741

                      1900
                      Budget authority (total)
                      5,014
                      5,019
                      4,741

                      1930
                      Total budgetary resources available
                      5,207
                      5,122
                      4,844

                      Memorandum (non-add) entries:

                      1941
                      Unexpired unobligated balance, end of year
                      103
                      103
                      103

                      Change in obligated balance:

                      Unpaid obligations:

                      3000
                      Unpaid obligations, brought forward, Oct 1
                      1,589
                      1,716
                      1,790

                      3010
                      New obligations, unexpired accounts
                      5,104
                      5,019
                      4,741

                      3011
                      Obligations ("upward adjustments"), expired accounts
                      18

                      3020
                      Outlays (gross)
                      –4,951
                      –4,945
                      –4,814

                      3040
                      Recoveries of prior year unpaid obligations, unexpired
                      –24

                      3041
                      Recoveries of prior year unpaid obligations, expired
                      –20

                      3050
                      Unpaid obligations, end of year
                      1,716
                      1,790
                      1,717

                      Memorandum (non-add) entries:

                      3100
                      Obligated balance, start of year
                      1,589
                      1,716
                      1,790

                      3200
                      Obligated balance, end of year
                      1,716
                      1,790
                      1,717

                      Budget authority and outlays, net:

                      Discretionary:

                      4000
                      Budget authority, gross
                      5,014
                      5,019
                      4,741

                      Outlays, gross:

                      4010
                      Outlays from new discretionary authority
                      3,313
                      3,413
                      3,224

                      4011
                      Outlays from discretionary balances
                      1,637
                      1,532
                      1,590

                      4020
                      Outlays, gross (total)
                      4,950
                      4,945
                      4,814

                      Offsets against gross budget authority and outlays:

                      Offsetting collections (collected) from:

                      4033
                      Non-Federal sources
                      –1

                      4040
                      Offsets against gross budget authority  and outlays (total)
                      –1

                      Additional offsets against gross budget authority only:

                      4052
                      Offsetting collections credited to expired accounts
                      1

                      4070
                      Budget authority, net (discretionary)
                      5,014
                      5,019
                      4,741

                      4080
                      Outlays, net (discretionary)
                      4,949
                      4,945
                      4,814

                      Mandatory:

                      Outlays, gross:

                      4101
                      Outlays from mandatory balances
                      1

                      4180
                      Budget authority, net (total)
                      5,014
                      5,019
                      4,741

                      4190
                      Outlays, net (total)
                      4,950
                      4,945
                      4,814

             This appropriation provides for the full costs associated with the space operations activities of the agency. The full costs
                include all labor, travel, procurement, test, and fabrication costs to execute these programs, which provide for all of the
                research; development; operations; salaries and related expenses; and other general and administrative activities supporting
                the programs within this account. Major themes within the Space Operations account include the International Space Station,
                Space Transportation, and Space and Flight Support. Performance goals associated with these activities are addressed in NASA's
                detailed budget request.

             The International Space Station is a complex of research laboratories in low Earth orbit in which America and its international
                partners, including Russia, Canada, Europe, and Japan, conduct unique scientific and technological investigations in a microgravity
                environment. The objective of the International Space Station is to support human space exploration and conduct science experiments
                and technology development unique to the on-orbit attributes of the facility.

             Space and Flight Support is comprised of multiple capabilities that provide on-going customer support for a wide range of
                services. The programs include Space Communications and Navigation, Human Space Flight Operations, Launch Services, and Rocket
                Propulsion Testing. They are provided to a wide range of customers including NASA, other U.S. Federal agencies, foreign governments,
                and commercial customers. The programs are managed by NASA's Human Exploration and Operations Mission Directorate, which also
                manages programs in the Exploration account.

             The Space Transportation theme's objective is to transport U.S. astronauts and cargo safely back and forth to America's orbiting
                national laboratory, ISS. This theme includes the Commercial Crew Program and ISS Crew and Cargo. Maintaining the ISS requires
                a fleet of vehicles and launch locations to transport astronauts, science experiments, critical supplies, maintenance hardware,
                and propellant to ISS, and to dispose of waste generated on ISS. The Commercial Crew Program partners with the U.S. private
                sector to develop and operate safe, reliable, and affordable crew transportation to low-Earth orbit. Within ISS Crew and Cargo
                Transportation, NASA currently purchases cargo transportation to the ISS under the CRS contracts with Orbital ATK and SpaceX
                and crew transportation from the Russian Space Agency, Roscosmos.

          Object Classification (in millions of dollars)

                      Identification code 080–0115–0–1–252
                      2016 actual
                      2017 est.
                      2018 est.

                      Direct obligations:

                      Personnel compensation:

                      11.1
                      Full-time permanent
                      272
                      308
                      308

                      11.3
                      Other than full-time permanent
                      2
                      2
                      2

                      11.5
                      Other personnel compensation
                      1
                      2
                      2

                      11.9
                      Total personnel compensation
                      275
                      312
                      312

                      12.1
                      Civilian personnel benefits
                      87
                      87
                      98

                      21.0
                      Travel and transportation of persons
                      13
                      13
                      12

                      22.0
                      Transportation of things
                      1,529
                      1,529
                      1,487

                      23.2
                      Rental payments to others
                      4
                      4
                      3

                      23.3
                      Communications, utilities, and miscellaneous charges
                      4
                      4
                      4

                      24.0
                      Printing and reproduction
                      1
                      1

                      25.1
                      Advisory and assistance services
                      88
                      88
                      79

                      25.2
                      Other services from non-Federal sources
                      125
                      125
                      128

                      25.3
                      Other goods and services from Federal sources
                      26
                      26
                      26

                      25.4
                      Operation and maintenance of facilities
                      36
                      36
                      37

                      25.5
                      Research and development contracts
                      2,589
                      2,467
                      2,227

                      25.7
                      Operation and maintenance of equipment
                      256
                      256
                      260

                      26.0
                      Supplies and materials
                      22
                      22
                      19

                      31.0
                      Equipment
                      21
                      21
                      17

                      32.0
                      Land and structures
                      3
                      3
                      4

                      41.0
                      Grants, subsidies, and contributions
                      25
                      25
                      28

                      99.9
                      Total new obligations, unexpired accounts
                      5,104
                      5,019
                      4,741

          Employment Summary

                      Identification code 080–0115–0–1–252
                      2016 actual
                      2017 est.
                      2018 est.

                      1001
                      Direct civilian full-time equivalent employment
                      2,240
                      2,332
                      2,349

             Office of inspector generalFor necessary expenses of the Office of Inspector General in carrying out the Inspector General Act of 1978, $39,300,000, to  remain available until September 30, 2019.
          Note.—A full-year 2017 appropriation for this account was not enacted at the time the budget was prepared; therefore, the
             budget assumes this account is operating under the Further Continuing Appropriations Act, 2017 (P.L. 114–254). The amounts
             included for 2017 reflect the annualized level provided by the continuing resolution.

          Program and Financing (in millions of dollars)

                      Identification code 080–0109–0–1–252
                      2016 actual
                      2017 est.
                      2018 est.

                      Obligations by program activity:

                      0001
                      Office of Inspector General (Direct)
                      37
                      37
                      39

                      0801
                      Office of Inspector General (Reimbursable)
                      1
                      1
                      1

                      0900
                      Total new obligations, unexpired accounts
                      38
                      38
                      40

                      Budgetary resources:

                      Budget authority:

                      Appropriations, discretionary:

                      1100
                      Appropriation
                      37
                      37
                      39

                      Spending authority from offsetting collections, discretionary:

                      1700
                      Collected
                      1
                      1
                      1

                      1900
                      Budget authority (total)
                      38
                      38
                      40

                      1930
                      Total budgetary resources available
                      38
                      38
                      40

                      Change in obligated balance:

                      Unpaid obligations:

                      3000
                      Unpaid obligations, brought forward, Oct 1
                      4
                      4

                      3010
                      New obligations, unexpired accounts
                      38
                      38
                      40

                      3011
                      Obligations ("upward adjustments"), expired accounts
                      1

                      3020
                      Outlays (gross)
                      –38
                      –42
                      –38

                      3041
                      Recoveries of prior year unpaid obligations, expired
                      –1

                      3050
                      Unpaid obligations, end of year
                      4

                      2

                      Memorandum (non-add) entries:

                      3100
                      Obligated balance, start of year
                      4
                      4

                      3200
                      Obligated balance, end of year
                      4

                      2

                      Budget authority and outlays, net:

                      Discretionary:

                      4000
                      Budget authority, gross
                      38
                      38
                      40

                      Outlays, gross:

                      4010
                      Outlays from new discretionary authority
                      34
                      38
                      36

                      4011
                      Outlays from discretionary balances
                      4
                      4
                      2

                      4020
                      Outlays, gross (total)
                      38
                      42
                      38

                      Offsets against gross budget authority and outlays:

                      Offsetting collections (collected) from:

                      4030
                      Federal sources
                      –1
                      –1
                      –1

                      4180
                      Budget authority, net (total)
                      37
                      37
                      39

                      4190
                      Outlays, net (total)
                      37
                      41
                      37

             This appropriation provides for the full costs associated with the operations of the NASA Office of Inspector General. The
                mission of the Office of Inspector General is to conduct audits and investigations of agency activities to prevent and detect
                fraud, waste, abuse, and mismanagement. The Inspector General keeps the Administrator and the Congress informed of problems
                and deficiencies in agency programs and operations.

          Object Classification (in millions of dollars)

                      Identification code 080–0109–0–1–252
                      2016 actual
                      2017 est.
                      2018 est.

                      Direct obligations:

                      11.1
                      Personnel compensation: Full-time permanent
                      23
                      23
                      23

                      12.1
                      Civilian personnel benefits
                      8
                      8
                      10

                      21.0
                      Travel and transportation of persons
                      1
                      1
                      1

                      25.2
                      Other services from non-Federal sources
                      3
                      3
                      3

                      25.3
                      Other goods and services from Federal sources
                      2
                      2
                      1

                      31.0
                      Equipment

                      1

                      99.0
                      Direct obligations
                      37
                      37
                      39

                      99.0
                      Reimbursable obligations
                      1
                      1
                      1

                      99.9
                      Total new obligations, unexpired accounts
                      38
                      38
                      40

          Employment Summary

                      Identification code 080–0109–0–1–252
                      2016 actual
                      2017 est.
                      2018 est.

                      1001
                      Direct civilian full-time equivalent employment
                      185
                      207
                      207

                      2001
                      Reimbursable civilian full-time equivalent employment
                      6
                      6
                      6

             Science, Aeronautics, and Exploration

             Program and Financing (in millions of dollars)

                      Identification code 080–0114–0–1–999
                      2016 actual
                      2017 est.
                      2018 est.

                      Budgetary resources:

                      Unobligated balance:

                      1000
                      Unobligated balance brought forward, Oct 1
                      1
                      1
                      1

                      1930
                      Total budgetary resources available
                      1
                      1
                      1

                      Memorandum (non-add) entries:

                      1941
                      Unexpired unobligated balance, end of year
                      1
                      1
                      1

                      Change in obligated balance:

                      Unpaid obligations:

                      3000
                      Unpaid obligations, brought forward, Oct 1
                      1

                      3020
                      Outlays (gross)
                      –1

                      Memorandum (non-add) entries:

                      3100
                      Obligated balance, start of year
                      1

                      Budget authority and outlays, net:

                      Discretionary:

                      Outlays, gross:

                      4011
                      Outlays from discretionary balances
                      1

                      4180
                      Budget authority, net (total)

                      4190
                      Outlays, net (total)
                      1

             NASA's Science, Aeronautics and Exploration account formerly included Science, Aeronautics Research, Exploration Systems and
                Cross Agency Support Programs. Beginning in 2009, Science, Aeronautics, Exploration, Education and Cross Agency Support were
                split into five separate appropriation accounts. The Science, Aeronautics, and Exploration account shows spending from balances
                prior to the account restructuring.

             Human Space Flight

             Program and Financing (in millions of dollars)

                      Identification code 080–0111–0–1–252
                      2016 actual
                      2017 est.
                      2018 est.

                      Budgetary resources:

                      Unobligated balance:

                      1000
                      Unobligated balance brought forward, Oct 1
                      1
                      1
                      1

                      1930
                      Total budgetary resources available
                      1
                      1
                      1

                      Memorandum (non-add) entries:

                      1941
                      Unexpired unobligated balance, end of year
                      1
                      1
                      1

                      Change in obligated balance:

                      Unpaid obligations:

                      3000
                      Unpaid obligations, brought forward, Oct 1
                      7
                      5

                      3011
                      Obligations ("upward adjustments"), expired accounts
                      5

                      3020
                      Outlays (gross)

                      –5

                      3041
                      Recoveries of prior year unpaid obligations, expired
                      –7

                      3050
                      Unpaid obligations, end of year
                      5

                      Memorandum (non-add) entries:

                      3100
                      Obligated balance, start of year
                      7
                      5

                      3200
                      Obligated balance, end of year
                      5

                      Budget authority and outlays, net:

                      Discretionary:

                      Outlays, gross:

                      4011
                      Outlays from discretionary balances

                      5

                      4180
                      Budget authority, net (total)

                      4190
                      Outlays, net (total)

                      5

             NASA's Human Space Flight account formerly included the International Space Station; Space Shuttle Payload and Expendable
                Launch Vehicle Support; Human Exploration and Development of Space Investments and Support; Space Communications and Data
                Systems; and Safety, Mission Assurance and Engineering. Beginning in 2004, Safety, Mission Assurance, and Engineering was
                allocated as an indirect charge to all programs and all other programs (along with the Crosscutting Technologies portion of
                the Aerospace Technology Enterprise) were rolled into the Space Flight Capabilities account. In 2005, the Space Flight Capabilities
                account was renamed the Exploration Capabilities account. In 2009, the Exploration Capabilities account was renamed Space
                Operations. The Human Space Flight account shows spending from balances prior to the account restructuring.

             Science, Aeronautics and Technology

             Program and Financing (in millions of dollars)

                      Identification code 080–0110–0–1–999
                      2016 actual
                      2017 est.
                      2018 est.

                      Budgetary resources:

                      Unobligated balance:

                      1000
                      Unobligated balance brought forward, Oct 1
                      1
                      1
                      1

                      1930
                      Total budgetary resources available
                      1
                      1
                      1

                      Memorandum (non-add) entries:

                      1941
                      Unexpired unobligated balance, end of year
                      1
                      1
                      1

                      Change in obligated balance:

                      Unpaid obligations:

                      3000
                      Unpaid obligations, brought forward, Oct 1
                      1
                      1
                      1

                      3050
                      Unpaid obligations, end of year
                      1
                      1
                      1

                      Memorandum (non-add) entries:

                      3100
                      Obligated balance, start of year
                      1
                      1
                      1

                      3200
                      Obligated balance, end of year
                      1
                      1
                      1

                      4180
                      Budget authority, net (total)

                      4190
                      Outlays, net (total)

             NASA's Science, Aeronautics and Technology account formerly included Space Science, Biological and Physical Research, Earth
                Science, Aerospace Technology, and Education. Beginning in 2004, Space Science, Biological and Physical Research, Earth Science,
                the Aeronautics portion of Aerospace Technology, and Education were rolled into the Science, Aeronautics and Exploration account.
                These programs are now funded by the Aeronautics, Education, Science, and Exploration accounts. The Science, Aeronautics,
                and Technology account shows spending from balances prior to the account restructuring.

             Mission Support

             Program and Financing (in millions of dollars)

                      Identification code 080–0112–0–1–999
                      2016 actual
                      2017 est.
                      2018 est.

                      Budgetary resources:

                      Unobligated balance:

                      1000
                      Unobligated balance brought forward, Oct 1
                      1
                      1
                      1

                      1930
                      Total budgetary resources available
                      1
                      1
                      1

                      Memorandum (non-add) entries:

                      1941
                      Unexpired unobligated balance, end of year
                      1
                      1
                      1

                      4180
                      Budget authority, net (total)

                      4190
                      Outlays, net (total)

             NASA's Mission Support account formerly included Research and Program Management and Construction of Facilities. The Mission
                Support account shows spending from residual construction of facilities balances from prior to 2004.

             Working Capital Fund

             Program and Financing (in millions of dollars)

                      Identification code 080–4546–0–4–252
                      2016 actual
                      2017 est.
                      2018 est.

                      Obligations by program activity:

                      0801
                      Working Capital Fund (Reimbursable)
                      415
                      491
                      498

                      Budgetary resources:

                      Unobligated balance:

                      1000
                      Unobligated balance brought forward, Oct 1
                      10
                      12
                      19

                      1021
                      Recoveries of prior year unpaid obligations
                      3
                      6

                      1050
                      Unobligated balance (total)
                      13
                      18
                      19

                      Budget authority:

                      Spending authority from offsetting collections, discretionary:

                      1700
                      Collected
                      414
                      492
                      492

                      1930
                      Total budgetary resources available
                      427
                      510
                      511

                      Memorandum (non-add) entries:

                      1941
                      Unexpired unobligated balance, end of year
                      12
                      19
                      13

                      Change in obligated balance:

                      Unpaid obligations:

                      3000
                      Unpaid obligations, brought forward, Oct 1
                      161
                      169
                      171

                      3010
                      New obligations, unexpired accounts
                      415
                      491
                      498

                      3020
                      Outlays (gross)
                      –404
                      –483
                      –492

                      3040
                      Recoveries of prior year unpaid obligations, unexpired
                      –3
                      –6

                      3050
                      Unpaid obligations, end of year
                      169
                      171
                      177

                      Memorandum (non-add) entries:

                      3100
                      Obligated balance, start of year
                      161
                      169
                      171

                      3200
                      Obligated balance, end of year
                      169
                      171
                      177

                      Budget authority and outlays, net:

                      Discretionary:

                      4000
                      Budget authority, gross
                      414
                      492
                      492

                      Outlays, gross:

                      4010
                      Outlays from new discretionary authority
                      246
                      344
                      344

                      4011
                      Outlays from discretionary balances
                      158
                      139
                      148

                      4020
                      Outlays, gross (total)
                      404
                      483
                      492

                      Offsets against gross budget authority and outlays:

                      Offsetting collections (collected) from:

                      4030
                      Federal sources
                      –403
                      –475
                      –473

                      4033
                      Non-Federal sources
                      –11
                      –17
                      –19

                      4040
                      Offsets against gross budget authority  and outlays (total)
                      –414
                      –492
                      –492

                      4080
                      Outlays, net (discretionary)
                      –10
                      –9

                      4180
                      Budget authority, net (total)

                      4190
                      Outlays, net (total)
                      –10
                      –9

             The Working Capital Fund provides goods and services on a reimbursable basis. The Fund consists of four program activities.
                The first is the Solutions for Enterprise-wide Procurement program, which finances, on an agency-wide basis, scientific and
                engineering workstation procurement. The second program is the Information Technology Infrastructure Integration Program which
                consolidates and centralizes management of NASA information technology services in the areas of Tier 1 service desk and ordering,
                web services and technologies, enterprise business and management applications, integrated network/communications services,
                end user services, and data center services. The third program, NASA's Shared Services Center, performs selected financial
                management, human resources, information technology, and procurement services for NASA Headquarters and Centers. The last
                program, the National Center for Critical Information Processing and Storage, provides federal customers collocation services
                at a Tier III level with complete redundancy in the electrical distribution system from the national grid to the rack level.

          Object Classification (in millions of dollars)

                      Identification code 080–4546–0–4–252
                      2016 actual
                      2017 est.
                      2018 est.

                      Reimbursable obligations:

                      11.1
                      Personnel compensation: Full-time permanent
                      14
                      14
                      17

                      12.1
                      Civilian personnel benefits
                      5
                      5
                      6

                      21.0
                      Travel and transportation of persons
                      1
                      1
                      1

                      25.1
                      Advisory and assistance services
                      1
                      1
                      1

                      25.2
                      Other services from non-Federal sources
                      46
                      46
                      46

                      25.3
                      Other goods and services from Federal sources
                      1
                      1
                      1

                      25.4
                      Operation and maintenance of facilities
                      4
                      4
                      4

                      25.7
                      Operation and maintenance of equipment
                      343
                      419
                      422

                      99.9
                      Total new obligations, unexpired accounts
                      415
                      491
                      498

          Employment Summary

                      Identification code 080–4546–0–4–252
                      2016 actual
                      2017 est.
                      2018 est.

                      2001
                      Reimbursable civilian full-time equivalent employment
                      145
                      140
                      161

          Trust Funds
             Science, Space, and Technology Education Trust Fund

             Special and Trust Fund Receipts (in millions of dollars)

                      Identification code 080–8978–0–7–503
                      2016 actual
                      2017 est.
                      2018 est.

                      0100
                      Balance, start of year
                      15
                      15
                      15

                      Receipts:

                      Current law:

                      1140
                      Earnings on Investments, Science, Space and Technology Education Trust Fund
                      1
                      1
                      1

                      2000
                      Total: Balances and receipts
                      16
                      16
                      16

                      Appropriations:

                      Current law:

                      2101
                      Science, Space, and Technology Education Trust Fund
                      –1
                      –1
                      –1

                      5099
                      Balance, end of year
                      15
                      15
                      15

          Program and Financing (in millions of dollars)

                      Identification code 080–8978–0–7–503
                      2016 actual
                      2017 est.
                      2018 est.

                      Obligations by program activity:

                      0001
                      Science, Space, and Technology Education Trust Fund (Direct)
                      1
                      1
                      1

                      0900
                      Total new obligations (object class 41.0)
                      1
                      1
                      1

                      Budgetary resources:

                      Budget authority:

                      Appropriations, mandatory:

                      1201
                      Appropriation (special or trust fund)
                      1
                      1
                      1

                      1930
                      Total budgetary resources available
                      1
                      1
                      1

                      Change in obligated balance:

                      Unpaid obligations:

                      3010
                      New obligations, unexpired accounts
                      1
                      1
                      1

                      3020
                      Outlays (gross)
                      –1
                      –1
                      –1

                      Budget authority and outlays, net:

                      Mandatory:

                      4090
                      Budget authority, gross
                      1
                      1
                      1

                      Outlays, gross:

                      4100
                      Outlays from new mandatory authority

                      1
                      1

                      4101
                      Outlays from mandatory balances
                      1

                      4110
                      Outlays, gross (total)
                      1
                      1
                      1

                      4180
                      Budget authority, net (total)
                      1
                      1
                      1

                      4190
                      Outlays, net (total)
                      1
                      1
                      1

                      Memorandum (non-add) entries:

                      5000
                      Total investments, SOY: Federal securities: Par value
                      16
                      16
                      16

                      5001
                      Total investments, EOY: Federal securities: Par value
                      16
                      16
                      16

             National Space Grant Program

             Program and Financing (in millions of dollars)

                      Identification code 080–8977–0–7–252
                      2016 actual
                      2017 est.
                      2018 est.

                      Change in obligated balance:

                      Unpaid obligations:

                      3000
                      Unpaid obligations, brought forward, Oct 1
                      1
                      1
                      1

                      3050
                      Unpaid obligations, end of year
                      1
                      1
                      1

                      Memorandum (non-add) entries:

                      3100
                      Obligated balance, start of year
                      1
                      1
                      1

                      3200
                      Obligated balance, end of year
                      1
                      1
                      1

                      4180
                      Budget authority, net (total)

                      4190
                      Outlays, net (total)

             Administrative Provisions

             Administrative provisions
             (Including transfers of funds)Funds for any announced prize otherwise authorized shall remain available, without fiscal year limitation, until the prize
                is claimed or the offer is withdrawn.
          Not to exceed 5 percent of any appropriation made available for the current fiscal year for the National Aeronautics and Space
                Administration in this Act may be transferred between such appropriations, but no such appropriation, except as otherwise
                specifically provided, shall be increased by more than 10 percent by any such transfers. Any such funds transferred to "Construction and Environmental Compliance and Restoration" for construction activities shall
                   not increase that appropriation by more than 20 percent. Balances so transferred shall be merged with and available for the same purposes and the same time period as the appropriations
                to which transferred. Any transfer pursuant to this provision shall be treated as a reprogramming of funds under section  504 of this Act and shall not be available for obligation except in compliance with the procedures set forth in that section.
          The spending plan required by this Act shall be provided by NASA at the theme and program level. The spending plan, as well as any subsequent change of an amount established in that spending plan that meets the
                notification requirements of section 504 of this Act, shall be treated as a reprogramming under section 504 of this Act and shall not be available for obligation or expenditure except in compliance with the procedures set forth in
                that section.

             General and Administrative Provisions

             GENERAL FUND RECEIPT ACCOUNTS

             (in millions of dollars)

                      2016 actual
                      2017 est.
                      2018 est.

                      Offsetting receipts from the public:

                      080–322000
                      All Other General Fund Proprietary Receipts Including Budget Clearing Accounts
                      5
                      15
                      15

                      General Fund Offsetting receipts from the public
                      5
                      15
                      15

                      Intragovernmental payments:

                      080–388500
                      Undistributed Intragovernmental Payments and Receivables from Cancelled Accounts
                      1

                      General Fund Intragovernmental payments
                      1