| Item | Obligations |
|---|---|
| Service Establishment Equipment and Supplies Merchant Wholesalers | $901M |
| All Other Miscellaneous Manufacturing | $592M |
| Photographic and Photocopying Equipment Manufacturing | $14.1M |
| Surgical Appliance and Supplies Manufacturing | $11.3M |
| Other Measuring and Controlling Device Manufacturing | $5.3M |
| All Other Miscellaneous Electrical Equipment and Component Manufacturing | $4.3M |
| All Other Miscellaneous Textile Product Mills | $2M |
| Measuring, Dispensing, and Other Pumping Equipment Manufacturing | $1.9M |
| Search, Detection, Navigation, Guidance, Aeronautical, and Nautical System and Instrument Manufacturing | $1.1M |
| Aircraft Manufacturing | $1.1M |
Service Establishment Equipment and Supplies Merchant Wholesalers is W S Darley and's largest federal market, with $901M in obligations.