| Acronym | Meaning |
 | FCOS | Flight Computer Operating System |
| LRSI | Low-temperature Reusable Surface Insulation |
| IBM | International Business Machines |
| HT | High Technology |
| ATP | Acceptace Test Procedure |
| DPI | Detail Program Interrelationships |
| PF | Power Factor |
| OSE | Orbiter Support Equipment |
| SHA | Sidereal Hour Angle |
| PTT | Push To Talk |
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