| Item | Obligations |
|---|---|
| Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology) | $4.3B |
| Guided Missile and Space Vehicle Manufacturing | $1.8B |
| Engineering Services | $673M |
| Research and Development in the Physical, Engineering, and Life Sciences (except Biotechnology) | $667M |
| Industrial Building Construction | $493M |
| Facilities Support Services | $412M |
| Research and Development in the Physical, Engineering, and Life Sciences | $407M |
| Nonscheduled Chartered Freight Air Transportation | $342M |
| Guided Missile and Space Vehicle Propulsion Unit and Propulsion Unit Parts Manufacturing | $232M |
| Other Computer Related Services | $201M |
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 $4.3B obligated (38.2% of contract spending).