| Acronym | Meaning |
 | OC | Open Circuit |
| N02 | Nitrogen Dioxide |
| GOAL | GrGOALGround Operations Aerospace Language |
| BTMS | Body Temperature Measuring System |
| BSC | Brake Skid Controller |
| ICC | Intercomputer Communication |
| OSF | Office Of Space Flight (now OSTS) |
| MLB | Multilayer Board |
| CCTV | Closed Circuit Television |
| S | Second (Astronomical Tables) |
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