| Acronym | Meaning |
 | LEM | Launch Escape Monitor |
| GPL | General Purpose Laboratory |
| VA | Vibro-Acoustic Test |
| TFU | Test Facility Utilization |
| PSCN | Preliminary Specification Change Notice |
| OSF | Office Of Space Flight (now OSTS) |
| KBU | Keyboard Unit |
| HAL/S | High Order Assembly Language For Shuttle Flight |
| NC | No Change |
| REN | RAD Rendezvous Radar |
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