| Acronym | Meaning |
 | IPS | IRG Inertial Rate Gyro |
| EDS | Emergency Detection System |
| DRN | Drain |
| B/U | Backup |
| PAM | Pulse Amplitude Modulation |
| OA | Office Of Applications (now OSTA) |
| SMTAS | Shuttle Model Test And Analysis System |
| CDH | Constant Delta Height |
| ESDU | Event Storage And Distribution Unit |
| CSIR | Computer Systems (Hardware/Software) Integration |
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