| Acronym | Meaning |
| IOPB | Input/output Parameter Buffer |
| TRK | Track |
| PSL/PPL | Process Support Language/process Programming Language |
| STEP | Standard For Exchange Of Product Model Data |
| RCV | Receive |
| TDD | Technical Discussion Document |
| CFCTS | Contract Flight Crew Training System |
| MDCS | Maintenance Data Collection System |
| IX | Unclassified Miscellaneous Ships |
| BYTE | Combined Bits Of Digital Computer Information (8,16,32) |