| Acronym | Meaning |
| PERF | Performance |
| PRB | Propeller Bulletin (tdc 65) |
| VECP | Value Engineering Change Proposal |
| BEARTRAP | Project |
| NPOS | Power Turbine Overspeed |
| NVIS | Near Vertical Incident Skywave |
| PMDB | Project Master Data Base (trw Ir&d Project Name) |
| WFE | Engine Fuel Flow |
| EFIS | Electronic Flight Information System |
| APARS | Automated Printing And Retrieval System |