| Acronym | Meaning |
 | PN | Planetary Nebula |
| CGF | Crystal Growth Furnace |
| IOTA | International Occultation Timing Association |
| BH | Black Hole |
| EUTELSAT | European Telecommunications Satellite Organization |
| USML | United States Microgravity Laboratory |
| EVA | Extravehicular Activity |
| IRAF | Image Reduction And Analysis Facility |
| UFO | Unidentified Flying Object |
| HCI | Highes Communications |
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