| Acronym | Meaning |
 | HALO | High Altitude Low Opening (parachute Jump) |
| ELSS | Emergency Life Support Stores |
| A2ATD OR A?ATD | Anti |
| SRC | Scheduled Removal Component |
| LTD | Limited |
| PSS | Personnel System Support |
| DPCO | Double-Pole Change Over |
| NNSA | U.S. National Nuclear Security Administration |
| PZ | Panama Canal Zone (ISO 3166 Digram; Obsolete 1980) -Pickup Zone |
| IGS | International Ground Station |
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