| Acronym | Meaning |
| CMS | Cockpit Management System |
| MSG | Message |
| YFND | Dry Dock Companion Craft (non-self Propelled) (misc) |
| MMM | Maintenance And Material Management (3m) |
| OFAB | Oil Filter Actual Bypass |
| SIMSYS | Simulation System (software) |
| PVS | Periscope View Simulators (associated With 21a Series) |
| QEC | Quick Engine Change (tdc 03) |
| AFFTC | Air Force Flight Test Center |
| RSR | Repair Survival Rate |