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    [Appendix]
    [Detailed Budget Estimates by Agency]
    [National Science Foundation]
    [From the U.S. Government Publishing Office, www.gpo.gov]

             <h1>NATIONAL SCIENCE FOUNDATION

             </h1>

          NATIONAL SCIENCE FOUNDATION

          Federal Funds
             Research and Related ActivitiesFor necessary expenses in carrying out the National Science Foundation Act of 1950 (42 U.S.C. 1861 et seq.), and Public Law
                86–209 (42 U.S.C. 1880 et seq.); services as authorized by section 3109 of title 5, United States Code; maintenance and operation
                of aircraft and purchase of flight services for research support; acquisition of aircraft; and authorized travel; $4,230,510,000, to remain available until September 30, 2020, of which not to exceed 500,000,000 shall remain available until expended for polar research and operations support, and for reimbursement to other Federal agencies
                for operational and science support and logistical and other related activities for the United States Antarctic program: Provided, That receipts for scientific support services and materials furnished by the National Research Centers and other National
                Science Foundation supported research facilities may be credited to this appropriation.
          Note.—A full-year 2018 appropriation for this account was not enacted at the time the budget was prepared; therefore, the
             budget assumes this account is operating under the Continuing Appropriations Act, 2018 (Division D of P.L. 115–56, as amended).
             The amounts included for 2018 reflect the annualized level provided by the continuing resolution.

          Program and Financing (in millions of dollars)

                      Identification code 049–0100–0–1–999
                      2017 actual
                      2018 est.
                      2019 est.

                      Obligations by program activity:

                      0001
                      Biological Sciences
                      742
                      742
                      526

                      0002
                      Computer and Information Science and Engineering
                      936
                      936
                      663

                      0003
                      Engineering
                      931
                      931
                      660

                      0005
                      Geosciences
                      826
                      826
                      585

                      0006
                      Mathematical and Physical Sciences
                      1,362
                      1,362
                      965

                      0007
                      Social, Behavioral and Economic Sciences
                      271
                      271
                      192

                      0008
                      Integrative Activities
                      420
                      440
                      262

                      0009
                      Office of International Science and Engineering
                      49
                      49
                      35

                      0010
                      Office of Polar Programs
                      468
                      468
                      342

                      0013
                      Arctic Research Commission
                      1
                      1
                      1

                      0799
                      Total direct obligations
                      6,006
                      6,026
                      4,231

                      0801
                      Research and Related Activities (Reimbursable)
                      66
                      120
                      120

                      0900
                      Total new obligations, unexpired accounts
                      6,072
                      6,146
                      4,351

                      Budgetary resources:

                      Unobligated balance:

                      1000
                      Unobligated balance brought forward, Oct 1
                      18
                      33

                      1021
                      Recoveries of prior year unpaid obligations
                      25

                      1050
                      Unobligated balance (total)
                      43
                      33

                      Budget authority:

                      Appropriations, discretionary:

                      1100
                      Appropriation
                      6,034
                      5,993
                      4,231

                      1120
                      Appropriations transferred to other acct [049–0180]
                      –22

                      1120
                      Appropriations transferred to other acct [049–0551]
                      –6

                      1160
                      Appropriation, discretionary (total)
                      6,006
                      5,993
                      4,231

                      Spending authority from offsetting collections, discretionary:

                      1700
                      Collected
                      73
                      120
                      120

                      1701
                      Change in uncollected payments, Federal sources
                      –14

                      1750
                      Spending auth from offsetting collections, disc (total)
                      59
                      120
                      120

                      1900
                      Budget authority (total)
                      6,065
                      6,113
                      4,351

                      1930
                      Total budgetary resources available
                      6,108
                      6,146
                      4,351

                      Memorandum (non-add) entries:

                      1940
                      Unobligated balance expiring
                      –3

                      1941
                      Unexpired unobligated balance, end of year
                      33

                      Change in obligated balance:

                      Unpaid obligations:

                      3000
                      Unpaid obligations, brought forward, Oct 1
                      10,101
                      10,235
                      10,758

                      3010
                      New obligations, unexpired accounts
                      6,072
                      6,146
                      4,351

                      3011
                      Obligations ("upward adjustments"), expired accounts
                      13

                      3020
                      Outlays (gross)
                      –5,867
                      –5,623
                      –5,417

                      3040
                      Recoveries of prior year unpaid obligations, unexpired
                      –25

                      3041
                      Recoveries of prior year unpaid obligations, expired
                      –59

                      3050
                      Unpaid obligations, end of year
                      10,235
                      10,758
                      9,692

                      Uncollected payments:

                      3060
                      Uncollected pymts, Fed sources, brought forward, Oct 1
                      –88
                      –63
                      –63

                      3070
                      Change in uncollected pymts, Fed sources, unexpired
                      14

                      3071
                      Change in uncollected pymts, Fed sources, expired
                      11

                      3090
                      Uncollected pymts, Fed sources, end of year
                      –63
                      –63
                      –63

                      Memorandum (non-add) entries:

                      3100
                      Obligated balance, start of year
                      10,013
                      10,172
                      10,695

                      3200
                      Obligated balance, end of year
                      10,172
                      10,695
                      9,629

                      Budget authority and outlays, net:

                      Discretionary:

                      4000
                      Budget authority, gross
                      6,065
                      6,113
                      4,351

                      Outlays, gross:

                      4010
                      Outlays from new discretionary authority
                      711
                      1,319
                      966

                      4011
                      Outlays from discretionary balances
                      5,156
                      4,304
                      4,451

                      4020
                      Outlays, gross (total)
                      5,867
                      5,623
                      5,417

                      Offsets against gross budget authority and outlays:

                      Offsetting collections (collected) from:

                      4030
                      Federal sources
                      –84
                      –120
                      –120

                      4040
                      Offsets against gross budget authority  and outlays (total)
                      –84
                      –120
                      –120

                      Additional offsets against gross budget authority only:

                      4050
                      Change in uncollected pymts, Fed sources, unexpired
                      14

                      4052
                      Offsetting collections credited to expired accounts
                      11

                      4060
                      Additional offsets against budget authority only (total)
                      25

                      4070
                      Budget authority, net (discretionary)
                      6,006
                      5,993
                      4,231

                      4080
                      Outlays, net (discretionary)
                      5,783
                      5,503
                      5,297

                      4180
                      Budget authority, net (total)
                      6,006
                      5,993
                      4,231

                      4190
                      Outlays, net (total)
                      5,783
                      5,503
                      5,297

             The Research and Related Activities appropriation enables the United States to provide leadership and promote progress across
                the expanding frontiers of scientific and engineering research and education.

             The major research program activities of NSF are:
             Biological Sciences.—This activity supports understanding how complex living systems function and interact with each other and with non-living
                systems, which has direct impacts on issues of national importance related to the economy, food, human welfare, and the environment.
                Research in this activity promotes scientific progress through support of research that crosses scales, from molecules to
                cells through organisms to ecosystems. This activity's investment portfolio includes projects on understanding the fundamental
                characteristics of biological energy systems, the changing dynamics of the biosphere, and infrastructure and research resources
                such as databases, research centers, and observatories, and efforts to broaden participation and develop the next generation
                of biological researchers.

             Computer and Information Science and Engineering.—This activity promotes the progress of computer and information science and engineering research and education, and advances
                the development and use of cyberinfrastructure across the science and engineering research enterprise; promotes understanding
                of the principles and uses of society; and contributes to universal, transparent, and affordable participation in a knowledge-based
                society.

             Engineering.—Research supported by this activity aims to increase U.S. engineering capability and strength, and focus that capability
                and strength on areas that are relevant to national problems and long-term needs. This activity also includes small business
                innovation research.

             Geosciences.—This activity supports research and associated infrastructure to advance knowledge of the properties and dynamics of the
                planet on which we live. Research includes understanding the causes and implications of earth system dynamics, as well as
                disruptive processes such as earthquakes and storms.

             Mathematical and Physical Sciences.—Research in this activity is directed at increasing understanding of natural laws and phenomena across the astronomical
                sciences, chemistry, materials sciences, mathematical sciences, and physics. Research support is available in multiple modalities
                ranging from multi-user facilities and mid-scale instrumentation to individual investigator awards, from sites for undergraduate
                research experiences to early career faculty development and collaborative and international efforts.

             Social, Behavioral, and Economic Sciences.—This activity supports research, education, and infrastructure in the social, behavioral, cognitive, and economic sciences
                and funds the collection and dissemination of statistics on the science and engineering enterprise.

             Office of International Science and Engineering.—This activity serves as the focal point of international activities at NSF. In addition to strategic funding and co-funding
                that targets catalytic partnerships and workforce-building international research opportunities, OISE advances NSF's global
                science leadership through extensive interactions with U.S. and global counterpart agencies and organizations.

             Office of Polar Programs.—This activity supports Arctic and Antarctic research and operational science support and other related activities for United
                States polar research programs, including the funding to reimburse Federal agencies for logistical and other related activities
                supported by the United States Antarctic Program.

             Integrative Activities.—This activity supports emerging cross disciplinary research efforts and major research instrumentation. This activity also
                provides support for the Science and Technology Policy Institute. The Established Program to Stimulate Competitive Research
                broadens participation of States and regions in science and engineering by helping institutions expand their research capacity
                and competitiveness.

             The United States Arctic Research Commission (USARC) is an independent agency, funded through NSF's appropriations. USARC promotes Arctic research and recommends national Arctic
                research policies to guide Federal agencies in developing and implementing their research programs in the Arctic region.

          Object Classification (in millions of dollars)

                      Identification code 049–0100–0–1–999
                      2017 actual
                      2018 est.
                      2019 est.

                      Direct obligations:

                      11.8
                      Personnel compensation: Special personal services payments
                      31
                      32
                      30

                      21.0
                      Travel and transportation of persons
                      14
                      15
                      12

                      25.1
                      Advisory and assistance services
                      123
                      120
                      90

                      25.2
                      Other services from non-Federal sources
                      9
                      9
                      8

                      25.3
                      Other goods and services from Federal sources
                      134
                      135
                      110

                      25.4
                      Operation and maintenance of facilities
                      224
                      225
                      200

                      25.5
                      Research and development contracts
                      9
                      10
                      9

                      31.0
                      Equipment
                      1

                      41.0
                      Grants, subsidies, and contributions
                      5,461
                      5,480
                      3,772

                      99.0
                      Direct obligations
                      6,006
                      6,026
                      4,231

                      99.0
                      Reimbursable obligations
                      66
                      120
                      120

                      99.9
                      Total new obligations, unexpired accounts
                      6,072
                      6,146
                      4,351

          Employment Summary

                      Identification code 049–0100–0–1–999
                      2017 actual
                      2018 est.
                      2019 est.

                      1001
                      Direct civilian full-time equivalent employment
                      3
                      3
                      3

             major research equipment and facilities constructionFor necessary expenses for the acquisition, construction, commissioning, and upgrading of major research equipment, facilities,
                and other such capital assets pursuant to the National Science Foundation Act of 1950 (42 U.S.C. 1861 et seq.), including
                authorized travel, $65,950,000, to remain available until expended.
          Note.—A full-year 2018 appropriation for this account was not enacted at the time the budget was prepared; therefore, the
             budget assumes this account is operating under the Continuing Appropriations Act, 2018 (Division D of P.L. 115–56, as amended).
             The amounts included for 2018 reflect the annualized level provided by the continuing resolution.

          Program and Financing (in millions of dollars)

                      Identification code 049–0551–0–1–251
                      2017 actual
                      2018 est.
                      2019 est.

                      Obligations by program activity:

                      0001
                      Major Research Equipment and Facilities Construction
                      223
                      239
                      66

                      0900
                      Total new obligations, unexpired accounts (object class 41.0)
                      223
                      239
                      66

                      Budgetary resources:

                      Unobligated balance:

                      1000
                      Unobligated balance brought forward, Oct 1
                      37
                      31

                      1021
                      Recoveries of prior year unpaid obligations
                      2

                      1050
                      Unobligated balance (total)
                      39
                      31

                      Budget authority:

                      Appropriations, discretionary:

                      1100
                      Appropriation
                      209
                      208
                      66

                      1121
                      Appropriations transferred from other acct [049–0100]
                      6

                      1160
                      Appropriation, discretionary (total)
                      215
                      208
                      66

                      1900
                      Budget authority (total)
                      215
                      208
                      66

                      1930
                      Total budgetary resources available
                      254
                      239
                      66

                      Memorandum (non-add) entries:

                      1941
                      Unexpired unobligated balance, end of year
                      31

                      Change in obligated balance:

                      Unpaid obligations:

                      3000
                      Unpaid obligations, brought forward, Oct 1
                      240
                      287
                      340

                      3010
                      New obligations, unexpired accounts
                      223
                      239
                      66

                      3020
                      Outlays (gross)
                      –174
                      –186
                      –189

                      3040
                      Recoveries of prior year unpaid obligations, unexpired
                      –2

                      3050
                      Unpaid obligations, end of year
                      287
                      340
                      217

                      Memorandum (non-add) entries:

                      3100
                      Obligated balance, start of year
                      240
                      287
                      340

                      3200
                      Obligated balance, end of year
                      287
                      340
                      217

                      Budget authority and outlays, net:

                      Discretionary:

                      4000
                      Budget authority, gross
                      215
                      208
                      66

                      Outlays, gross:

                      4010
                      Outlays from new discretionary authority

                      12
                      4

                      4011
                      Outlays from discretionary balances
                      174
                      174
                      185

                      4020
                      Outlays, gross (total)
                      174
                      186
                      189

                      4180
                      Budget authority, net (total)
                      215
                      208
                      66

                      4190
                      Outlays, net (total)
                      174
                      186
                      189

             The Major Research Equipment and Facilities Construction activity supports the acquisition, construction, and commissioning
                of unique national research platforms and major research facilities and equipment. Performance of each construction project
                is measured against an established baseline at regular intervals and at major milestones.

             Agency operations and award managementFor agency operations and award management necessary in carrying out the National Science Foundation Act of 1950 (42 U.S.C.
                1861 et seq.); services authorized by section 3109 of title 5, United States Code; hire of passenger motor vehicles; uniforms
                or allowances therefor, as authorized by sections 5901 and 5902 of title 5, United States Code; rental of conference rooms
                in the District of Columbia; and reimbursement of the Department of Homeland Security for security guard services; $333,630,000: Provided, That not to exceed $8,280 is for official reception and representation expenses: Provided further, That contracts may be entered into under this heading in fiscal year 2019 for maintenance and operation of facilities and for other services to be provided during the next fiscal year.
          Note.—A full-year 2018 appropriation for this account was not enacted at the time the budget was prepared; therefore, the
             budget assumes this account is operating under the Continuing Appropriations Act, 2018 (Division D of P.L. 115–56, as amended).
             The amounts included for 2018 reflect the annualized level provided by the continuing resolution.

          Program and Financing (in millions of dollars)

                      Identification code 049–0180–0–1–251
                      2017 actual
                      2018 est.
                      2019 est.

                      Obligations by program activity:

                      0001
                      Agency Operations and Award Management
                      382
                      329
                      334

                      0801
                      Agency Operations and Award Management (Reimbursable)
                      4
                      10
                      10

                      0900
                      Total new obligations, unexpired accounts
                      386
                      339
                      344

                      Budgetary resources:

                      Unobligated balance:

                      1000
                      Unobligated balance brought forward, Oct 1
                      24
                      1

                      Budget authority:

                      Appropriations, discretionary:

                      1100
                      Appropriation
                      330
                      328
                      334

                      1121
                      Appropriations transferred from other acct [049–0100]
                      22

                      1121
                      Appropriations transferred from other acct [049–0106]
                      7

                      1160
                      Appropriation, discretionary (total)
                      359
                      328
                      334

                      Spending authority from offsetting collections, discretionary:

                      1700
                      Collected
                      4
                      10
                      10

                      1900
                      Budget authority (total)
                      363
                      338
                      344

                      1930
                      Total budgetary resources available
                      387
                      339
                      344

                      Memorandum (non-add) entries:

                      1941
                      Unexpired unobligated balance, end of year
                      1

                      Change in obligated balance:

                      Unpaid obligations:

                      3000
                      Unpaid obligations, brought forward, Oct 1
                      117
                      111
                      61

                      3010
                      New obligations, unexpired accounts
                      386
                      339
                      344

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

                      3020
                      Outlays (gross)
                      –387
                      –389
                      –340

                      3041
                      Recoveries of prior year unpaid obligations, expired
                      –6

                      3050
                      Unpaid obligations, end of year
                      111
                      61
                      65

                      Memorandum (non-add) entries:

                      3100
                      Obligated balance, start of year
                      117
                      111
                      61

                      3200
                      Obligated balance, end of year
                      111
                      61
                      65

                      Budget authority and outlays, net:

                      Discretionary:

                      4000
                      Budget authority, gross
                      363
                      338
                      344

                      Outlays, gross:

                      4010
                      Outlays from new discretionary authority
                      269
                      279
                      284

                      4011
                      Outlays from discretionary balances
                      118
                      110
                      56

                      4020
                      Outlays, gross (total)
                      387
                      389
                      340

                      Offsets against gross budget authority and outlays:

                      Offsetting collections (collected) from:

                      4030
                      Federal sources
                      –4
                      –10
                      –10

                      4040
                      Offsets against gross budget authority  and outlays (total)
                      –4
                      –10
                      –10

                      4180
                      Budget authority, net (total)
                      359
                      328
                      334

                      4190
                      Outlays, net (total)
                      383
                      379
                      330

             This account funds NSF's scientific, professional, and administrative workforce; the physical and technological infrastructure
                necessary for a productive, safe and secure work environment; and the essential business operations critical to NSF's administrative
                processes.

          Object Classification (in millions of dollars)

                      Identification code 049–0180–0–1–251
                      2017 actual
                      2018 est.
                      2019 est.

                      Direct obligations:

                      Personnel compensation:

                      11.1
                      Full-time permanent
                      155
                      158
                      160

                      11.3
                      Other than full-time permanent
                      12
                      14
                      15

                      11.5
                      Other personnel compensation
                      2
                      2
                      2

                      11.9
                      Total personnel compensation
                      169
                      174
                      177

                      12.1
                      Civilian personnel benefits
                      51
                      52
                      53

                      21.0
                      Travel and transportation of persons
                      6
                      6
                      6

                      23.1
                      Rental payments
                      32
                      28
                      31

                      23.2
                      Rental payments to others
                      2
                      1

                      23.3
                      Communications, utilities, and miscellaneous charges
                      1
                      2
                      2

                      24.0
                      Printing and reproduction
                      1

                      1

                      25.1
                      Advisory and assistance services
                      79
                      44
                      42

                      25.2
                      Other services from non-Federal sources
                      11
                      8
                      9

                      25.3
                      Other goods and services from Federal sources
                      24
                      7
                      9

                      26.0
                      Supplies and materials
                      2
                      1
                      1

                      31.0
                      Equipment
                      4
                      6
                      3

                      99.0
                      Direct obligations
                      382
                      329
                      334

                      99.0
                      Reimbursable obligations
                      4
                      10
                      10

                      99.9
                      Total new obligations, unexpired accounts
                      386
                      339
                      344

          Employment Summary

                      Identification code 049–0180–0–1–251
                      2017 actual
                      2018 est.
                      2019 est.

                      1001
                      Direct civilian full-time equivalent employment
                      1,309
                      1,352
                      1,352

             Office of the national science boardFor necessary expenses (including payment of salaries, authorized travel, hire of passenger motor vehicles, the rental of
                conference rooms in the District of Columbia, and the employment of experts and consultants under section 3109 of title 5,
                United States Code) involved in carrying out section 4 of the National Science Foundation Act of 1950 (42 U.S.C. 1863) and
                Public Law 86–209 (42 U.S.C. 1880 et seq.), $4,320,000: Provided, That not to exceed $2,500 shall be available for official reception and representation expenses.
          Note.—A full-year 2018 appropriation for this account was not enacted at the time the budget was prepared; therefore, the
             budget assumes this account is operating under the Continuing Appropriations Act, 2018 (Division D of P.L. 115–56, as amended).
             The amounts included for 2018 reflect the annualized level provided by the continuing resolution.

          Program and Financing (in millions of dollars)

                      Identification code 049–0350–0–1–251
                      2017 actual
                      2018 est.
                      2019 est.

                      Obligations by program activity:

                      0001
                      Office of the National Science Board
                      4
                      4
                      4

                      Budgetary resources:

                      Budget authority:

                      Appropriations, discretionary:

                      1100
                      Appropriation
                      4
                      4
                      4

                      1930
                      Total budgetary resources available
                      4
                      4
                      4

                      Change in obligated balance:

                      Unpaid obligations:

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

                      3010
                      New obligations, unexpired accounts
                      4
                      4
                      4

                      3020
                      Outlays (gross)
                      –4
                      –4
                      –4

                      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

                      Budget authority and outlays, net:

                      Discretionary:

                      4000
                      Budget authority, gross
                      4
                      4
                      4

                      Outlays, gross:

                      4010
                      Outlays from new discretionary authority
                      3
                      3
                      3

                      4011
                      Outlays from discretionary balances
                      1
                      1
                      1

                      4020
                      Outlays, gross (total)
                      4
                      4
                      4

                      4180
                      Budget authority, net (total)
                      4
                      4
                      4

                      4190
                      Outlays, net (total)
                      4
                      4
                      4

             This appropriation provides policy-making and related responsibilities for NSF and provides guidance on significant national
                policy issues in science and engineering research and education, as required by law.

          Object Classification (in millions of dollars)

                      Identification code 049–0350–0–1–251
                      2017 actual
                      2018 est.
                      2019 est.

                      Direct obligations:

                      11.1
                      Personnel compensation: Full-time permanent
                      2
                      2
                      2

                      12.1
                      Civilian personnel benefits
                      1
                      1
                      1

                      25.1
                      Advisory and assistance services
                      1
                      1
                      1

                      99.9
                      Total new obligations, unexpired accounts
                      4
                      4
                      4

          Employment Summary

                      Identification code 049–0350–0–1–251
                      2017 actual
                      2018 est.
                      2019 est.

                      1001
                      Direct civilian full-time equivalent employment
                      18
                      18
                      18

             Office of inspector generalFor necessary expenses of the Office of Inspector General as authorized by the Inspector General Act of 1978, $14,820,000, of which $400,000 shall remain available until September 30, 2020.
          Note.—A full-year 2018 appropriation for this account was not enacted at the time the budget was prepared; therefore, the
             budget assumes this account is operating under the Continuing Appropriations Act, 2018 (Division D of P.L. 115–56, as amended).
             The amounts included for 2018 reflect the annualized level provided by the continuing resolution.

          Program and Financing (in millions of dollars)

                      Identification code 049–0300–0–1–251
                      2017 actual
                      2018 est.
                      2019 est.

                      Obligations by program activity:

                      0001
                      Office of Inspector General (Direct)
                      15
                      15
                      15

                      Budgetary resources:

                      Budget authority:

                      Appropriations, discretionary:

                      1100
                      Appropriation
                      15
                      15
                      15

                      1930
                      Total budgetary resources available
                      15
                      15
                      15

                      Change in obligated balance:

                      Unpaid obligations:

                      3000
                      Unpaid obligations, brought forward, Oct 1
                      3
                      3
                      3

                      3010
                      New obligations, unexpired accounts
                      15
                      15
                      15

                      3020
                      Outlays (gross)
                      –15
                      –15
                      –15

                      3050
                      Unpaid obligations, end of year
                      3
                      3
                      3

                      Memorandum (non-add) entries:

                      3100
                      Obligated balance, start of year
                      3
                      3
                      3

                      3200
                      Obligated balance, end of year
                      3
                      3
                      3

                      Budget authority and outlays, net:

                      Discretionary:

                      4000
                      Budget authority, gross
                      15
                      15
                      15

                      Outlays, gross:

                      4010
                      Outlays from new discretionary authority
                      13
                      12
                      12

                      4011
                      Outlays from discretionary balances
                      2
                      3
                      3

                      4020
                      Outlays, gross (total)
                      15
                      15
                      15

                      4180
                      Budget authority, net (total)
                      15
                      15
                      15

                      4190
                      Outlays, net (total)
                      15
                      15
                      15

             This appropriation provides agency-wide audit and investigative functions to identify and correct management and administrative
                deficiencies which create conditions for existing or potential instances of fraud, waste, and mismanagement consistent with
                the Inspector General Act of 1978, as amended (5 U.S.C. App. 3).

          Object Classification (in millions of dollars)

                      Identification code 049–0300–0–1–251
                      2017 actual
                      2018 est.
                      2019 est.

                      Direct obligations:

                      11.1
                      Personnel compensation: Full-time permanent
                      9
                      9
                      9

                      12.1
                      Civilian personnel benefits
                      3
                      3
                      3

                      25.2
                      Other services from non-Federal sources
                      3
                      3
                      3

                      99.9
                      Total new obligations, unexpired accounts
                      15
                      15
                      15

          Employment Summary

                      Identification code 049–0300–0–1–251
                      2017 actual
                      2018 est.
                      2019 est.

                      1001
                      Direct civilian full-time equivalent employment
                      72
                      72
                      72

             Education and human resourcesFor necessary expenses in carrying out science, mathematics and engineering education and human resources programs and activities
                pursuant to the National Science Foundation Act of 1950 (42 U.S.C. 1861 et seq.), including services as authorized by section
                3109 of title 5, United States Code, authorized travel, and rental of conference rooms in the District of Columbia, $618,770,000, to remain available until September 30, 2020.
          Note.—A full-year 2018 appropriation for this account was not enacted at the time the budget was prepared; therefore, the
             budget assumes this account is operating under the Continuing Appropriations Act, 2018 (Division D of P.L. 115–56, as amended).
             The amounts included for 2018 reflect the annualized level provided by the continuing resolution.

          Program and Financing (in millions of dollars)

                      Identification code 049–0106–0–1–251
                      2017 actual
                      2018 est.
                      2019 est.

                      Obligations by program activity:

                      0001
                      Education and Human Resources
                      874
                      882
                      619

                      0100
                      Total Disc obligations
                      874
                      882
                      619

                      0302
                      Low income scholarship program
                      84
                      182
                      75

                      0303
                      ITEST grants for Mathematics, Science, or Engineering enrichment courses
                      35
                      59
                      25

                      0391
                      Total Mandatory Obligations (H-1B)
                      119
                      241
                      100

                      0799
                      Total direct obligations
                      993
                      1,123
                      719

                      0801
                      Education and Human Resources (Reimbursable)
                      4
                      15
                      15

                      0900
                      Total new obligations, unexpired accounts
                      997
                      1,138
                      734

                      Budgetary resources:

                      Unobligated balance:

                      1000
                      Unobligated balance brought forward, Oct 1
                      80
                      105

                      1001
                      Discretionary unobligated balance brought fwd, Oct 1
                      5
                      8

                      1021
                      Recoveries of prior year unpaid obligations
                      7

                      1050
                      Unobligated balance (total)
                      87
                      105

                      Budget authority:

                      Appropriations, discretionary:

                      1100
                      Appropriation
                      880
                      874
                      619

                      1120
                      Appropriations transferred to other acct [049–0180]
                      –7

                      1160
                      Appropriation, discretionary (total)
                      873
                      874
                      619

                      Appropriations, mandatory:

                      1201
                      Appropriation (special or trust fund)
                      141
                      142
                      100

                      1203
                      Appropriation (previously unavailable)
                      7
                      10
                      8

                      1232
                      Appropriations and/or unobligated balance of appropriations temporarily reduced
                      –10
                      –8

                      1260
                      Appropriations, mandatory (total)
                      138
                      144
                      108

                      Spending authority from offsetting collections, discretionary:

                      1700
                      Collected
                      1
                      15
                      15

                      1701
                      Change in uncollected payments, Federal sources
                      4

                      1750
                      Spending auth from offsetting collections, disc (total)
                      5
                      15
                      15

                      1900
                      Budget authority (total)
                      1,016
                      1,033
                      742

                      1930
                      Total budgetary resources available
                      1,103
                      1,138
                      742

                      Memorandum (non-add) entries:

                      1940
                      Unobligated balance expiring
                      –1

                      1941
                      Unexpired unobligated balance, end of year
                      105

                      8

                      Change in obligated balance:

                      Unpaid obligations:

                      3000
                      Unpaid obligations, brought forward, Oct 1
                      2,241
                      2,340
                      2,269

                      3010
                      New obligations, unexpired accounts
                      997
                      1,138
                      734

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

                      3020
                      Outlays (gross)
                      –876
                      –1,209
                      –1,116

                      3040
                      Recoveries of prior year unpaid obligations, unexpired
                      –7

                      3041
                      Recoveries of prior year unpaid obligations, expired
                      –16

                      3050
                      Unpaid obligations, end of year
                      2,340
                      2,269
                      1,887

                      Uncollected payments:

                      3060
                      Uncollected pymts, Fed sources, brought forward, Oct 1
                      –7
                      –11
                      –11

                      3070
                      Change in uncollected pymts, Fed sources, unexpired
                      –4

                      3090
                      Uncollected pymts, Fed sources, end of year
                      –11
                      –11
                      –11

                      Memorandum (non-add) entries:

                      3100
                      Obligated balance, start of year
                      2,234
                      2,329
                      2,258

                      3200
                      Obligated balance, end of year
                      2,329
                      2,258
                      1,876

                      Budget authority and outlays, net:

                      Discretionary:

                      4000
                      Budget authority, gross
                      878
                      889
                      634

                      Outlays, gross:

                      4010
                      Outlays from new discretionary authority
                      43
                      137
                      102

                      4011
                      Outlays from discretionary balances
                      715
                      945
                      835

                      4020
                      Outlays, gross (total)
                      758
                      1,082
                      937

                      Offsets against gross budget authority and outlays:

                      Offsetting collections (collected) from:

                      4030
                      Federal sources
                      –1
                      –16
                      –15

                      4040
                      Offsets against gross budget authority  and outlays (total)
                      –1
                      –16
                      –15

                      Additional offsets against gross budget authority only:

                      4050
                      Change in uncollected pymts, Fed sources, unexpired
                      –4

                      4052
                      Offsetting collections credited to expired accounts

                      1

                      4060
                      Additional offsets against budget authority only (total)
                      –4
                      1

                      4070
                      Budget authority, net (discretionary)
                      873
                      874
                      619

                      4080
                      Outlays, net (discretionary)
                      757
                      1,066
                      922

                      Mandatory:

                      4090
                      Budget authority, gross
                      138
                      144
                      108

                      Outlays, gross:

                      4100
                      Outlays from new mandatory authority

                      16
                      12

                      4101
                      Outlays from mandatory balances
                      118
                      111
                      167

                      4110
                      Outlays, gross (total)
                      118
                      127
                      179

                      4180
                      Budget authority, net (total)
                      1,011
                      1,018
                      727

                      4190
                      Outlays, net (total)
                      875
                      1,193
                      1,101

             The Education and Human Resources (EHR) appropriation funds and manages a comprehensive set of programs that further NSF's
                goals of ensuring a diverse, globally competitive U.S. science, technology, engineering, and mathematics (STEM) workforce,
                as well as a scientifically literate population. To advance those goals, EHR collaborates with other NSF research units and
                federal agencies, and promotes public-private partnerships. EHR supports research on STEM teaching and learning to provide
                the evidence base for improvements in education at all levels in the STEM disciplines. Supporting development and effective
                implementation of new learning technologies is also a priority. EHR's pre-K-12 education-research programs, for example, develop
                and test new instruction materials for students and teachers, which incorporate the latest advances in teaching, learning,
                and education technologies. STEM teacher-education opportunities occur throughout the full continuum, from pre-service and
                in-service, through life-long learning. Research programs at the undergraduate level improve curricula, strengthen laboratory
                courses, enhance faculty effectiveness, and lead education reforms in STEM disciplines. Advanced technological education programs
                strengthen student preparation for the high-technology workforce. Support of graduate-level STEM education primarily includes
                fellowships and traineeships to sustain U.S. leadership in global science and technology. All EHR programs aim to broaden
                participation of groups underrepresented in STEM fields by, for example, improving infrastructure and academic programs at
                minority-serving institutions. EHR activities also include programs supported by H-1B non-immigrant visa fees, which provide
                undergraduate and graduate scholarships in STEM disciplines, improve educational opportunities for students, and provide research
                opportunities for STEM teachers and students.

          Object Classification (in millions of dollars)

                      Identification code 049–0106–0–1–251
                      2017 actual
                      2018 est.
                      2019 est.

                      Direct obligations:

                      11.8
                      Personnel compensation: Special personal services payments
                      4
                      4
                      4

                      21.0
                      Travel and transportation of persons
                      1
                      1
                      1

                      25.1
                      Advisory and assistance services
                      26
                      25
                      20

                      25.2
                      Other services from non-Federal sources
                      2
                      2
                      2

                      41.0
                      Grants, subsidies, and contributions
                      960
                      1,091
                      692

                      99.0
                      Direct obligations
                      993
                      1,123
                      719

                      99.0
                      Reimbursable obligations
                      4
                      15
                      15

                      99.9
                      Total new obligations, unexpired accounts
                      997
                      1,138
                      734

          Trust Funds
             Donations

             Special and Trust Fund Receipts (in millions of dollars)

                      Identification code 049–8960–0–7–251
                      2017 actual
                      2018 est.
                      2019 est.

                      0100
                      Balance, start of year

                      Receipts:

                      Current law:

                      1130
                      Donations, National Science Foundation
                      41
                      35
                      35

                      2000
                      Total: Balances and receipts
                      41
                      35
                      35

                      Appropriations:

                      Current law:

                      2101
                      Donations
                      –41
                      –35
                      –35

                      5099
                      Balance, end of year

          Program and Financing (in millions of dollars)

                      Identification code 049–8960–0–7–251
                      2017 actual
                      2018 est.
                      2019 est.

                      Obligations by program activity:

                      0002
                      Gemini Telescope
                      19
                      26
                      11

                      0003
                      B&M Gates Foundation
                      1
                      2
                      1

                      0004
                      International Ocean Drilling
                      22
                      39
                      22

                      0900
                      Total new obligations, unexpired accounts (object class 41.0)
                      42
                      67
                      34

                      Budgetary resources:

                      Unobligated balance:

                      1000
                      Unobligated balance brought forward, Oct 1
                      24
                      32

                      1021
                      Recoveries of prior year unpaid obligations
                      9

                      1050
                      Unobligated balance (total)
                      33
                      32

                      Budget authority:

                      Appropriations, mandatory:

                      1201
                      Appropriation (special or trust fund)
                      41
                      35
                      35

                      1930
                      Total budgetary resources available
                      74
                      67
                      35

                      Memorandum (non-add) entries:

                      1941
                      Unexpired unobligated balance, end of year
                      32

                      1

                      Change in obligated balance:

                      Unpaid obligations:

                      3000
                      Unpaid obligations, brought forward, Oct 1
                      37
                      43
                      77

                      3010
                      New obligations, unexpired accounts
                      42
                      67
                      34

                      3020
                      Outlays (gross)
                      –27
                      –33
                      –45

                      3040
                      Recoveries of prior year unpaid obligations, unexpired
                      –9

                      3050
                      Unpaid obligations, end of year
                      43
                      77
                      66

                      Memorandum (non-add) entries:

                      3100
                      Obligated balance, start of year
                      37
                      43
                      77

                      3200
                      Obligated balance, end of year
                      43
                      77
                      66

                      Budget authority and outlays, net:

                      Mandatory:

                      4090
                      Budget authority, gross
                      41
                      35
                      35

                      Outlays, gross:

                      4100
                      Outlays from new mandatory authority

                      21
                      21

                      4101
                      Outlays from mandatory balances
                      27
                      12
                      24

                      4110
                      Outlays, gross (total)
                      27
                      33
                      45

                      4180
                      Budget authority, net (total)
                      41
                      35
                      35

                      4190
                      Outlays, net (total)
                      27
                      33
                      45

             This account consists of contributions from foreign governments, organizations, and individuals to fund various cooperative
                efforts in science, research, and education. These efforts include major international projects, such as operation of the
                Gemini telescopes, and the NSF ocean discovery program. Other smaller activities supported include cooperative research, joint
                seminars, exchange of senior scientists, short-term research development visits, international conferences, and support for
                certain special functions of NSF and the National Science Board. These funds are not otherwise available.

             Administrative Provision

             Administrative provisionNot to exceed 5 percent of any appropriation made available for the current fiscal year for the National Science Foundation
                in this Act may be transferred between such appropriations, but no such appropriation shall be increased by more than 10 percent
                by any such transfers. Any transfer pursuant to this section 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.

             General and Administrative Provisions

             GENERAL FUND RECEIPT ACCOUNTS

             (in millions of dollars)

                      2017 actual
                      2018 est.
                      2019 est.

                      Offsetting receipts from the public:

                      049–320000
                      Collections of Receivables from Canceled Accounts

                      1
                      1

                      049–322000
                      All Other General Fund Proprietary Receipts Including Budget Clearing Accounts
                      5
                      5
                      5

                      General Fund Offsetting receipts from the public
                      5
                      6
                      6