| Acronym | Meaning |
| NSRDS | National Standard Reference Data System |
| UIC | Unit Identification Code |
| Y/C | Luminance/Chrominance |
| ABLE | Activity Balance Line Evaluation |
| GOS | Geomagnetic Observing System |
| VAP | Voluntary Assistance Program |
| GOCO | Government Owned |
| STEP | Solar Terrestrial Energy Program |
| DC | Direct Current |
| EIR | Eidgenossisches Institut Fur Reaktorforschung |