| Item | Obligations |
|---|---|
| Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology) | $5.6B |
| Guided Missile and Space Vehicle Manufacturing | $3.2B |
| Research and Development in the Physical, Engineering, and Life Sciences (except Biotechnology) | $824M |
| Engineering Services | $796M |
| Facilities Support Services | $640M |
| Industrial Building Construction | $596M |
| Research and Development in the Physical, Engineering, and Life Sciences | $436M |
| Nonscheduled Chartered Freight Air Transportation | $430M |
| Other Computer Related Services | $273M |
| Guided Missile and Space Vehicle Propulsion Unit and Propulsion Unit Parts Manufacturing | $234M |
Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology) was National Aeronautics and Space Administration's largest contract category, with $5.6B obligated (36.6% of contract spending).