| Item | Obligations |
|---|---|
| Engineering Services | $1.8B |
| Telephone Apparatus Manufacturing | $1.2B |
| Telecommunications Resellers | $1.2B |
| Search, Detection, Navigation, Guidance, Aeronautical, and Nautical System and Instrument Manufacturing | $1.1B |
| Deep Sea Freight Transportation | $986M |
| Highway, Street, and Bridge Construction | $787M |
| Computer Systems Design Services | $691M |
| Commercial and Institutional Building Construction | $640M |
| All Other Professional, Scientific, and Technical Services | $551M |
| Other Computer Related Services | $411M |
Engineering Services was Transportation's largest contract category, with $1.8B obligated (13.8% of contract spending).