| Acronym | Meaning |
| PIC | Programmable Interval Clock |
| VE | Equivalent Velocity |
| SCB | Schedule Change Board |
| RFW | Request For Waiver (Deviation) |
| FTS | Functional Test Specifications |
| ORP | OFS Retransmission Processor |
| D/C | DisplaYs/Controls |
| GT | Greater Than |
| LCL | Local |
| SCAMA | Station Conferencing And Monitoring Arrangement |