| Acronym | Meaning |
| ISU | Intermediate Storage Unit |
| TMS | Thermatic Mapper Simulator |
| FIAR | European Aviation Partnership |
| MSI | Maximum Strategy |
| LGSOWG | Landsat Ground Station Operators Working Group |
| ANSS | American Nature Study Society |
| BIT | Binary Digit (either 0 Or 1) |
| HDLC | High Level Data Link Control |
| GCP | Global Chemistry Program |
| VRR | Visual Radio Range |