| Item | Obligations |
|---|---|
| Aircraft Manufacturing | $43.9B |
| Guided Missile and Space Vehicle Manufacturing | $31.6B |
| Engineering Services | $30.3B |
| Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology) | $27.4B |
| Ship Building and Repairing | $21.6B |
| Other Aircraft Parts and Auxiliary Equipment Manufacturing | $15.7B |
| Direct Health and Medical Insurance Carriers | $13.9B |
| Search, Detection, Navigation, Guidance, Aeronautical, and Nautical System and Instrument Manufacturing | $10.8B |
| Other Heavy and Civil Engineering Construction | $10.2B |
| Commercial and Institutional Building Construction | $10.2B |
Aircraft Manufacturing was Defense's largest contract category, with $43.9B obligated (12.2% of contract spending).