| Acronym | Meaning |
| DDP | Digital Data Processing (Processor) |
| HEAO | High Energy Astronomy Observatory |
| FACS | Finance And Control System |
| PMR | Performance Measurement Report |
| AEG | AEG Telefunken |
| SCNR | Scanner |
| LAGEOS | Laser Geodynamic Satellite |
| SLD | Stiff-Leg Derrick |
| OAST | Office Of Aeronautics And Space Technology |
| STD | LStandard Distribution List (letter Denoting Which List |