| Acronym | Meaning |
| CBX | C-Band Transponder |
| MT | Master Timer |
| REDUN | Redundancy |
| ESDU | Event Storage And Distribution Unit |
| SYNCOM | Synchronous Communication Satellite (Hughes) |
| ECD | Engineering Control Drawing |
| OMRB | Operating Material Review Board |
| IP | Identification Of Position |
| LCB | Least Common Bit |
| SERVO | Servomechanism |