| Acronym | Meaning |
| IPE | Industrial Plant Equipment |
| SPIDF | Support Planning Identification File |
| SIMFAC | Simulation Facility |
| PCU | Process Control Unit |
| SPN | Shuttle Project Notice (KSC) |
| D | LSC Defense Logistics Service Center |
| EPWG | Environmental Projects Working Group |
| FRCS | Forward Reaction Control System (Subsystem) |
| OTDA | Office Of Tracking And Data Acquisition (now OSTDS) |
| SYNCOM | Hughes Spin Stabilized Spacecraft |