| Acronym | Meaning |
 | ADI | Alternating Direction Implicit |
| VIRGS | VISSR Image Registration And Gridding System |
| TOPS | Transcendental Operating System |
| TIROS I | Television Infrared Observation Satellite |
| DME | Distance-measuring Equipment |
| CCD | Charge-Couple Device |
| NAVAID | Navigation Aid |
| BUREC | Bureau Of Reclamation |
| SID | Sudden Ionospheric Disturbance |
| EOSAT | Earth Observation Satellite Company |
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