| Acronym | Meaning |
| PCR | Program Change Request |
| FMSP | Frequency Modulation Signal Processor |
| TMU | Temperature Measurement Unit |
| SERVO | Servomechanism |
| HOLC | High Order Language Computer |
| ICC | Intercomputer Communication |
| R | Rear |
| DH | Decision Height |
| LCB | Least Common Bit |
| M/LR | Maintenance Loop Recorder |