| Item | Obligations |
|---|---|
| Service Establishment Equipment and Supplies Merchant Wholesalers | $517M |
| All Other Miscellaneous Manufacturing | $436M |
| Photographic and Photocopying Equipment Manufacturing | $13.9M |
| Surgical Appliance and Supplies Manufacturing | $11M |
| Other Measuring and Controlling Device Manufacturing | $3M |
| All Other Miscellaneous Electrical Equipment and Component Manufacturing | $2M |
| All Other Miscellaneous Textile Product Mills | $1.7M |
| Measuring, Dispensing, and Other Pumping Equipment Manufacturing | $1.4M |
| Aircraft Manufacturing | $1.1M |
| Apparel Accessories and Other Apparel Manufacturing | $1M |
Service Establishment Equipment and Supplies Merchant Wholesalers is W S Darley and's largest federal market, with $517M in obligations.