| Acronym | Meaning |
| HW | Ha Rd Wa Re |
| IOB | InPut/Output Buffer (if Bus |
| CDPIS | Command Data Processing And Instrumentation System |
| CD | Center Director (KSC Directorate) |
| PIA | Preinstallation Acceptance |
| SERVO | Servomechanism |
| IED | Interacting Equipment Documents |
| SIA | Software Impact Assessment |
| FM/PM | Frequency Modulation/Phase Modulation |
| DVT | Design Verification Testing |