| Acronym | Meaning |
| DCN | Design Change Notice |
| APS | Avionic Processing System |
| IEEE | Institute Of Electrical And Electronic Engineers |
| SPC | Software Productivity Consortium |
| TADMUS | Tactical Decision Making Under Stress |
| DCN | Defense Communications Network |
| CAI | Computer Aided Instruction |
| SDRD | Supportability Design Requirements Document |
| IUS | Interim (inertial) Upper Stage |
| LWR | Lower |