- Because of rounding, detail may not add to totals.
- Dashes or asterisks appearing in lieu of figures indicate that the amounts are less than 50 thousand dollars or less than 0.5 percent.
- The abbreviation "FFRDCs" appearing in statistical tables refers to federally funded research and development centers.
- In tables showing extramural performers, obligations of the U.S. Department of Agriculture to agricultural experiment stations are included within obligations to universities and colleges.
- Defense agencies within the Department of Defense include the Advanced Research Projects Agency, the Ballistic Missile Defense Organization, the Defense Information Systems Agency, the Defense Logistics Agency, the Defense Mapping Agency, the
Defense Nuclear Agency, the Joint Staff, the Special Operations Command, the Uniformed Services University of the Health Sciences, and the Washington Headquarters Service.
- To better differentiate between that part of the Federal R&D budget which supports "science and key enabling technologies" (including for military and nondefense applications) and that which primarily concerns "testing and evaluation"
(of mostly defense-related systems), NSF now collects from DoD development dollars in two categories, advanced technology development and major systems development.