| Acronym | Meaning |
| FO | Orbital Frequency |
| PPP | Parallelizing PreProcessor |
| FTACH | Fourier Tachometer |
| CCM4 | Community Climate Model 4 |
| UV | Ultraviolet |
| IFC | InFlight Black Body Calibrator |
| CCB | Change Control Board |
| ESIG | Environmental And Societal Impacts Group |
| ACL | Alternative Concentration Level/limit |
| BATS | Biosphere-atmosphere Transfer Scheme |