| Acronym | Meaning |
| I/O | Input/ouput |
| CTDA | Cockpit Thrust Drive Actuator |
| OPTN | Option |
| SSBN | Submarine Ballistic Nuclear |
| IRP | Intermediate Rated Power (30 Minutes) |
| IOPB | Input/output Parameter Buffer |
| CFI | Contractor Final Inspection |
| CLTE | Cost And Lead Time Estimate |
| TCB | Target Control System Bulletin (tdc 78) |
| VSD | Vertical Situation Display |