| Acronym | Meaning |
| O/I | Optimal Interpolation |
| IGE | International Group Elements |
| GREM | Geopotential Research Explorer Mission |
| JASON | Group Of Physicists At Stanford That Study Various Projects And Are Funded By Government Defense Money |
| ISSS | International Society Of Soil Science |
| CDCL | Contract Document Control List |
| IUPAP | International Union Of Pure And Applied Physics |
| TRANET | Tracking Network |
| NESDD | NOAA Earth Science Data Directory |
| JETDLAG | Part Of EUROTRAC |