| Item | Obligations |
|---|---|
| Other Communications Equipment Manufacturing | $360M |
| Copper Rolling, Drawing, Extruding, and Alloying | $137M |
| Radio and Television Broadcasting and Wireless Communications Equipment Manufacturing | $126M |
| Engineering Services | $116M |
| Other Aircraft Parts and Auxiliary Equipment Manufacturing | $115M |
| Search, Detection, Navigation, Guidance, Aeronautical, and Nautical System and Instrument Manufacturing | $104M |
| Ammunition (except Small Arms) Manufacturing | $62.1M |
| Other Heavy and Civil Engineering Construction | $52.1M |
| Commercial and Institutional Building Construction | $47.6M |
| Offices of Certified Public Accountants | $47M |
Other Communications Equipment Manufacturing was the largest industry in Iowa, with $360M obligated.