| Acronym | Meaning |
| CASSINI | Saturn Orbiter And Titan Probe |
| PVO | Pioneer Venus Orbiter / Protivo-Vosdushniya Oborona |
| U3P | Union Pour La Promotion De La Propulsion Photonique |
| RAE | Royal Aerospace Establishment |
| MOMS | Modular Optoelectronic Multispectral/Stereo Scanner |
| OMS | Orbital Maneuvering System |
| IOTA | Infrared-Optical Telescope Array |
| AOA | Angle Of Attack |
| GOX | Gaseous OXygen |
| DARPA | Defense Advanced Research Projects Agency |