| Item | Obligations |
|---|---|
| Aircraft Manufacturing | $36.7B |
| Guided Missile and Space Vehicle Manufacturing | $26.5B |
| Engineering Services | $26.2B |
| Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology) | $21B |
| Ship Building and Repairing | $18.4B |
| Direct Health and Medical Insurance Carriers | $13B |
| Other Aircraft Parts and Auxiliary Equipment Manufacturing | $11.4B |
| Other Heavy and Civil Engineering Construction | $9.6B |
| Search, Detection, Navigation, Guidance, Aeronautical, and Nautical System and Instrument Manufacturing | $9.1B |
| Commercial and Institutional Building Construction | $8B |
Aircraft Manufacturing was Defense's largest contract category, with $36.7B obligated (12.3% of contract spending).