| Acronym | Meaning |
| GRO | Gamma Ray Observatory |
| LCS | Instrumentation Control SYstem |
| HAC | Heading Alignment Circle |
| BME | Bench Maintenance Equipment |
| SMP | Software Management Plan |
| CIU | Controller Interface Unit |
| IPS | Inertial Reference Integrating Gyro |
| EFFGRO | Efficient Growth (Computer Program) |
| NOES | National Operational Environmental Satellite Serv. |
| DK | Deck |