| PSC | Description
|
| C1AA | Architect and Engineering- Construction: Office Buildings |
| C1AB | Architect and Engineering- Construction: Conference Space and Facilities |
| C1AZ | Architect and Engineering- Construction: Other Administrative Facilities/service Buildings |
| C1BA | Architect and Engineering- Construction: Air Traffic Control Towers |
| C1BB | Architect and Engineering- Construction: Air Traffic Control Training Facilities |
| C1BC | Architect and Engineering- Construction: Radar and Navigational Facilities |
| C1BD | Architect and Engineering- Construction: Airport Runways and Taxiways |
| C1BE | Architect and Engineering- Construction: Airport Terminals |
| C1BF | Architect and Engineering- Construction: Missile System Facilities |
| C1BG | Architect and Engineering- Construction: Electronic and Communications Facilities |
| C1BZ | Architect and Engineering- Construction: Other Airfield Structures |
| C1CA | Architect and Engineering- Construction: Schools |
| C1CZ | Architect and Engineering- Construction: Other Educational Buildings |
| C1DA | Architect and Engineering- Construction: Hospitals and Infirmaries |
| C1DB | Architect and Engineering- Construction: Laboratories and Clinics |
| C1DZ | Architect and Engineering- Construction: Other Hospital Buildings |
| C1EA | Architect and Engineering- Construction: Ammunition Facilities |
| C1EB | Architect and Engineering- Construction: Maintenance Buildings |
| C1EC | Architect and Engineering- Construction: Production Buildings |
| C1ED | Architect and Engineering- Construction: Ship Construction and Repair Facilities |
| C1EE | Architect and Engineering- Construction: Tank Automotive Facilities |
| C1EZ | Architect and Engineering- Construction: Other Industrial Buildings |
| C1FA | Architect and Engineering- Construction: Family Housing Facilities |
| C1FB | Architect and Engineering- Construction: Recreational Buildings |
| C1FC | Architect and Engineering- Construction: Troop Housing Facilities |
| C1FD | Architect and Engineering- Construction: Dining Facilities |
| C1FE | Architect and Engineering- Construction: Religious Facilities |
| C1FF | Architect and Engineering- Construction: Penal Facilities |
| C1FZ | Architect and Engineering- Construction: Other Residential Buildings |
| C1GA | Architect and Engineering- Construction: Ammunition Storage Buildings |
| C1GB | Architect and Engineering- Construction: Food Or Grain Storage Buildings |
| C1GC | Architect and Engineering- Construction: Fuel Storage Buildings |
| C1GD | Architect and Engineering- Construction: Open Storage Facilities |
| C1GZ | Architect and Engineering- Construction: Other Warehouse Buildings |
| C1HA | Architect and Engineering- Construction: Government-owned Contractor-operated (goco) R&d Facs |
| C1HB | Architect and Engineering- Construction: Government-owned Government-operated (gogo) R&d Facs |
| C1HC | Architect and Engineering- Construction: Govt-owned Ctr-operated (goco) Environmental Laboratories |
| C1HZ | Architect and Engineering- Construction: Govt-owned Govt-operated (gogo) Environmental Laboratories |
| C1JA | Architect and Engineering- Construction: Museums and Exhibition Buildings |
| C1JB | Architect and Engineering- Construction: Testing and Measurement Buildings |
| C1JZ | Architect and Engineering- Construction: Miscellaneous Buildings |
| C1KA | Architect and Engineering- Construction: Dams |
| C1KB | Architect and Engineering- Construction: Canals |
| C1KC | Architect and Engineering- Construction: Mine Fire Control Facilities |
| C1KD | Architect and Engineering- Construction: Mine Subsidence Control Facilities |
| C1KE | Architect and Engineering- Construction: Surface Mine Reclamation Facilities |
| C1KF | Architect and Engineering- Construction: Dredging Facilities |
| C1KZ | Architect and Engineering- Construction: Other Conservation and Development Facilities |
| C1LA | Architect and Engineering- Construction: Airport Service Roads |
| C1LB | Architect and Engineering- Construction: Highways, Roads, Streets, Bridges, and Railways |
| C1LC | Architect and Engineering- Construction: Tunnels and Subsurface Structures |
| C1LZ | Architect and Engineering- Construction: Parking Facilities |
| C1MA | Architect and Engineering- Construction: Epg Facilities - Coal |
| C1MB | Architect and Engineering- Construction: Epg Facilities - Gas |
| C1MC | Architect and Engineering- Construction: Epg Facilities - Geothermal |
| C1MD | Architect and Engineering- Construction: Epg Facilities - Hydro |
| C1ME | Architect and Engineering- Construction: Epg Facilities - Nuclear |
| C1MF | Architect and Engineering- Construction: Epg Facilities - Petroleum |
| C1MG | Architect and Engineering- Construction: Epg Facilities - Solar |
| C1MH | Architect and Engineering- Construction: Epg Facilities - Wind |
| C1MZ | Architect and Engineering- Construction: Epg Facilities - Other, Including Transmission |
| C1NA | Architect and Engineering- Construction: Fuel Supply Facilities |
| C1NB | Architect and Engineering- Construction: Heating and Cooling Plants |
| C1NC | Architect and Engineering- Construction: Pollution Abatement and Control Facilities |
| C1ND | Architect and Engineering- Construction: Sewage and Waste Facilities |
| C1NE | Architect and Engineering- Construction: Water Supply Facilities |
| C1NZ | Architect and Engineering- Construction: Other Utilities |
| C1PA | Architect and Engineering- Construction: Recreational Facilities (non-building) |
| C1PB | Architect and Engineering- Construction: Exhibit Design (non-building) |
| C1PC | Architect and Engineering- Construction: Unimproved Real Property (land) |
| C1PD | Architect and Engineering- Construction: Waste Treatment and Storage Facilities |
| C1PZ | Architect and Engineering- Construction: Other Non-building Facilities |
| C1QA | Architect and Engineering- Construction: Restoration Of Real Property (public Or Private) |
| C211 | Architect and Engineering- General: Landscaping, Interior Layout, and Designing |
| C212 | Architect and Engineering- General: Engineering Drafting, Not Cad/cam |
| C213 | Architect and Engineering- General: Inspection (non-construction) |
| C214 | Architect and Engineering- General: Management Engineering |
| C215 | Architect and Engineering- General: Production Engineering |
| C216 | Architect and Engineering- General: Marine Engineering |
| C219 | Architect and Engineering- General: Other |
| C220 | Architect and Engineering- General: Structural Engineering |
| C221 | Architect and Engineering- General: Plumbing Systems |
| C222 | Architect and Engineering- General: Electrical Systems |
| C223 | Architect and Engineering- General: Mechanical Systems |