| Acronym | Meaning |
| CESM | Cryptologic Electronic Warfare Support Measures |
| IECS | Intergrated Environmental Control System |
| T | Top |
| PMS | Program Management System |
| WB | Wet Bulb |
| QUP | Quantity Per Unit Pack |
| MTBD | Mean Time Between Demands |
| MAOT | Maximum Allowable Operating Time |
| SOM | System Operators Manual |
| IRS | Interface Requirements Specification |