| Acronym | Meaning |
 | INFOTERRA | International Environmental Research And Referral Service Of UNEP |
| IGY | International Geophysical Year |
| NOAASIS | NOAA Satellite Information System |
| EAG | Exposure Assessment Group |
| OTB | Operations Training Branch |
| EURATOM | European Atomic Energy Agency/Community |
| CDDIS | Crustal Dynamics Data Information System |
| EGP | Exterior Gateway Protocol |
| R | Rayleigh |
| SH | Southern Hemisphere |
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