| Acronym | Meaning |
| PFS | Physical Facilities Service(s) |
| BEJ | Best Expert Judgment |
| KNET/SPARTACUS | N/A |
| EO-ICWG | Earth Observation International Coordination Working Group |
| BSD UNIX | Berkeley Software Distribution UNIX |
| BAC | Biosphere-Atmosphere Chemistry |
| PB | Product Of Polarization And Brightness |
| BBS | Bulletin Board System |
| MILOX | Mid-Latitutde Ecosystem And Photochemical Oxidants |
| SOPAC | Scripps Orbit And Permanent Array Center |