| Acronym | Meaning |
| REC | Record (RCD Preferred) |
| IMD | Intermediate |
| H | MHinge Mount |
| OPSR | Operations Supervisor (GSTDN Site) |
| STP | Shuttle Technology Panel |
| OUT | Output |
| TMF | Transporter Maintenance Facility |
| SLF | Shuttle Landing Facility (OLF) |
| OSTP | Orbiting System Test Plan |
| PMI | Preventive Maintenance Instruction |