| Acronym | Meaning |
 | NAS | National Aircraft Standard |
| MTU | MobileTrainingUnit |
| SRD | Shuttle Requirements Definition |
| SDG | Supplier Documentation Group |
| VAR | Variable |
| OSF | Office Of Space Flight (now OSTS) |
| HIU | Headset Interface Unit |
| SLT | ERNO Spacelab Technology |
| JOP | Joint Operating Procedure |
| TTLM | Through-the-Lens Light Metering |
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