| Acronym | Meaning |
 | S/C | Signal Conditioner |
| SATAF | Shuttle Activation Task Force |
| DIH | Discrete Input High |
| DFCS | Digital Flight Control Software (System) |
| R | Radius |
| IBM | International Business Machines |
| PSI | Pounds Per Square Inch (Static Pressure) |
| SPOM | STS Planning And Operations Management |
| CPDS | Computer Program Design (or Development) Specificat |
| G-A | Ground-to-Air |
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