| PSC | Description
|
| M111 | Oper of govt office buildings |
| M112 | Oper of govt conf space & fac |
| M119 | Oper of govt other admin-svc bldgs |
| M121 | Oper of govt air traffic towers |
| M122 | Oper of govt air traffic tng fac |
| M123 | Oper of govt radar & nav facility |
| M124 | Oper of govt airport runways |
| M125 | Oper of govt airport terminals |
| M126 | Oper of govt missile systems fac |
| M127 | Oper of govt elct & comm sys fac |
| M129 | Oper of govt other airfield struct |
| M131 | Oper of govt schools |
| M139 | Oper of govt other educational bldg |
| M141 | Oper of govt hospitals & infirmary |
| M142 | Oper of govt labs & clinics |
| M149 | Oper of govt other hospital bldgs |
| M151 | Oper of govt ammunition facilities |
| M152 | Oper of govt maint bldgs |
| M153 | Oper of govt production bldgs |
| M154 | Oper of govt ship const-rep fac |
| M155 | Oper of govt tank automotive fac |
| M159 | Oper of govt other industrial bldg |
| M161 | Oper of govt family housing |
| M162 | Oper of govt recreational bldgs |
| M163 | Oper of govt troop housing |
| M164 | Oper of govt dining facilities |
| M165 | Oper of govt religious facilities |
| M166 | Oper of govt penal facilities |
| M169 | Oper of govt other residential bldg |
| M171 | Oper of govt ammo storage bldgs |
| M172 | Oper of govt food storage bldgs |
| M173 | Oper of govt fuel storage bldgs |
| M174 | Oper of govt open storage fac |
| M179 | Oper of govt other warehouse bldgs |
| M181 | Oper of govt R&D goco facilities |
| M182 | Oper of govt R&D gogo facilities |
| M183 | Oper of govt R&D goco envir labs |
| M184 | Oper of govt R&D gogo envir labs |
| M191 | Oper of govt exhibition buildings |
| M192 | Oper of govt test buildings |
| M199 | Oper of govt misc bldgs |
| M211 | Oper of govt dams |
| M212 | Oper of govt canals |
| M213 | Oper of govt mine fire cont |
| M214 | Oper of govt mine subsidence contr |
| M215 | Oper of govt surface mine reclam |
| M216 | Oper of govt dredging |
| M219 | Oper of govt other consv structure |
| M221 | Oper of govt airport service roads |
| M222 | Oper of govt hwys-roads-bridges |
| M223 | Oper of govt tunnels-subsurf struc |
| M224 | Oper of govt parking facilities |
| M231 | Oper of govt epg - coal |
| M232 | Oper of govt epg - gas |
| M233 | Oper of govt epg - geothermal |
| M234 | Oper of govt epg - hydro |
| M235 | Oper of govt epg - nuclear |
| M236 | Oper of govt epg - petroleum |
| M237 | Oper of govt epg - solar |
| M239 | Oper of govt epg - other |
| M241 | Oper of govt fuel supply |
| M242 | Oper of govt heating & cool plants |
| M243 | Oper of govt pollution abatement |
| M244 | Oper of govt sewage & waste |
| M245 | Oper of govt water supply |
| M249 | Oper of govt other utilities |
| M291 | Oper of govt recrea non-bldg struc |
| M292 | Oper of govt exhibit (non bldg) |
| M293 | Oper of govt unimproved real prop |
| M294 | Oper of govt waste trmt-store fac |
| M299 | Oper of govt all oth non-bldg facs |
| M300 | Oper of govt restoration |