| Acronym | Meaning |
 | AD | Aperture Door |
| HOLC | High Order Language Computer |
| MPS | Material Processing System |
| SSTC | Space Shuttle Test Conductor |
| FLN | Fuel Line |
| M50 | Mean Of 1950 (Coordinate System) |
| IPS | IRIG Inertial Rate Integrating Gyro |
| SML | Structure Mold Line |
| ITS | Interim Teleprinter System |
| ISOL | Isolate |
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