| Acronym | Meaning |
| LBA/TRMM | Large Scale Biosphere-Atmosphere Experiment In Amazonia/Tropical Rainfall Measuring Mission |
| AX | Auxiliary Systems |
| AI | Authorized Inspector |
| EPI | Environmental Policy Institute |
| PMS | Particle Measuring Systems |
| MCCS | Mesoscale Convective Complexes |
| ARTCC | Air Route Traffic Control Center |
| APS | Advanced Power Source |
| NIP | National And International Program |
| MDM | Multiplexer/demultiplexer |