| Acronym | Meaning |
| IAD | Interface Agreement Document |
| CCS | Command And Communication System |
| GHC | Ground Half Coupling |
| BSR | Bite Status Register |
| FRE | Flight Related Element |
| DDP | Digital Data Processing (Processor) |
| TTL | Transistor-Transistor Logic |
| FACI | First Article Configuration Inspection |
| OBCO | Onboard Checkout (Instrumentation) |
| PMD | PMDLPalmdale |