| Acronym | Meaning |
| MODIS-T | MODIS-Tilt |
| MACRO | Monopoles |
| APE | Auroral Photography Experiment |
| VEEGA | Venus-Earth-Earth Gravity Assist |
| RTG | Radioisotope Thermoelectric Generator |
| IKI | Institut Kosmischeskikh Issledovaniya |
| IOTA | Infrared-Optical Telescope Array |
| VLA | Very Large Array |
| COMSAT | Communications Satellite (Corporation) |
| BFC | Backup Flight Computer |