| Acronym | Meaning |
| ENG | Engine |
| CSDS | Control Speed Drive Starter |
| DD | Digital Data |
| FAR | Federal Aviation Regulation |
| ISEO | In-service Engineering Office |
| TWCS | Through Water Communications System |
| EOFCS | Electro-optical Fire Control System (seafire) |
| PROPTIP | Proprotor Tip |
| STEP | Standard For Exchange Of Product Model Data |
| SPC | Software Productivity Consortium |