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Documents in the NTIS Technical Reports collection are the results of federally funded research. They are directly submitted to or collected by NTIS from Federal agencies for permanent accessibility to industry, academia and the public.  Before purchasing from NTIS, you may want to check for free access from (1) the issuing organization's website; (2) the U.S. Government Printing Office's Federal Digital System website http://www.gpo.gov/fdsys; (3) the federal government Internet portal USA.gov; or (4) a web search conducted using a commercial search engine such as http://www.google.com.

Subject Coverage of the NTIS Collection

NTIS annually receives tens of thousands of new publications, technical reports, and other products. These come from hundreds of government agencies and other organizations. The list below shows the number of items received by topic.

Topic Received during
Fiscal Year 2009
Administration and Management 4,539
Aeronautics and Aerodynamics 998
Agriculture and Food 1,741
Astronomy and Astrophysics 299
Atmospheric Sciences 611
Behavior and Society 7,361
Biomedical Technology and Human Factors Engineering 449
Building Industry Technology 486
Business and Economics 4,801
Chemistry 1,678
Civil Engineering 972
Combustion, Engines, and Propellants 388
Communication 1,058
Computers, Control, and Information Theory 2,280
Detection and Countermeasures 749
Electrotechnology 630
Energy 1,763
Environmental Pollution and Control 2,845
Government Inventions for Licensing 30
Health Care 2,113
Industrial and Mechanical Engineering 1,030
Library and Information Sciences 992
Manufacturing Technology 588
Materials Sciences 930
Mathematical Sciences 978
Medicine and Biology 5,616
Military Sciences 5,209
Missile Technology 73
Natural Resources and Earth Sciences 2,616
Navigation, Guidance, and Control 252
Nuclear Science and Technology 1,067
Ocean Sciences and Technology 1,286
Ordnance 703
Photography and Recording Devices 83
Physics 2,504
Problem-Solving Information for State and Local Governments 3,087
Space Technology 812
Transportation 2,222
Urban and Regional Technology and Development 3,830