| Acronym | Meaning |
| ATAMC | Air Transport Association Meteorological Committee |
| PMB | Performance Measurement Baseline |
| UGGI | See IUGG |
| PEM | Particle Environment Monitor |
| MTTF | Mean Time To Failure |
| TIMS | Thermal Infrared Multispectral Scanner |
| IAP | International Affiliates Program |
| AGS | Alternating-gradient Synchrotron |
| DME | Distance-measuring Equipment |
| IDCS | Image-dissector Camera System |