| Acronym | Meaning |
| IR | InfraRed |
| CELSS | Controlled Ecological Life Support System |
| DSP | Defense Support Program |
| SEP | Societe Europeenne De Propulsion |
| SMC | Small Magellanic Cloud |
| SBIR | Small Business Innovation Research |
| ATM | Apollo Telescope Mount (on Skylab) |
| VEEGA | Venus-Earth-Earth Gravity Assist |
| ALPO | Association Of Lunar And Planetary Observers |
| BH | Black Hole |