| Acronym | Meaning |
| PVC | Polyvinyl Chloride |
| ABU | Analog Backup |
| AIVP | Anti-ice Valve Position |
| SS | Attack Submarine (conventional Powered) |
| CESM | Cryptologic Electronic Warfare Support Measures |
| NU | Nose Up |
| CMI | Computer Managed Instruction |
| JUSTIS | Joint Uniform Services Technical Information System |
| DEL | Delete |
| PHC | Photographic Change (tdc 68) |