| Item | Obligations |
|---|---|
| Other Communications Equipment Manufacturing | $286M |
| Copper Rolling, Drawing, Extruding, and Alloying | $116M |
| Other Aircraft Parts and Auxiliary Equipment Manufacturing | $111M |
| Radio and Television Broadcasting and Wireless Communications Equipment Manufacturing | $106M |
| Engineering Services | $104M |
| Search, Detection, Navigation, Guidance, Aeronautical, and Nautical System and Instrument Manufacturing | $101M |
| Other Heavy and Civil Engineering Construction | $51.8M |
| Ammunition (except Small Arms) Manufacturing | $42M |
| Commercial and Institutional Building Construction | $41.4M |
| Offices of Certified Public Accountants | $38.3M |
Other Communications Equipment Manufacturing was the largest industry in Iowa, with $286M obligated.