| Acronym | Meaning |
| PTB | Payload Timing Buffer |
| MTL | Main Transfer Line |
| DFE | Direction Finding Equipment |
| SBHC | Speed Brake Hand Controller |
| OSE | Operating SupPort Equipment |
| OFDS | Oxygen Fluid Distribution System |
| PSIG | Pounds Per Square Inch Gauge |
| ERR | CNTR Error Counter |
| COMPL | Completed |
| DOT/CIAP | DOT Climatic Impact Assessment Program |