| Acronym | Meaning |
| KR | Kilorayleigh |
| PDU | Protocol Data Unit |
| P/L-EX | Payload Executive |
| GWS | Gateway Service |
| TIMED | Thermosphere-Ionosphere-Mesosphere Energetics & Dynamics |
| ACRIM | Active Cavity Radiometer Irradiance Monitor |
| FTIR | Fourier Transformed Infrared |
| GHOST | Global Horizontal Sounding Technique |
| GCEC | Global Change And Ecological Complexity |
| XMDSL | X Window Interface Distributed Software Library |