| Acronym | Meaning |
 | CBR | Cosmic Background Radiation |
| GEM | Giotto Extended Mission |
| SPTN | SPARTAN |
| ASS | Antenna Support Structure |
| FFT | Fast Fourier Transform |
| IOTA | International Occultation Timing Association |
| BFS | Backup Flight System |
| ISAS | Institute Of Space AND Astronautical Science |
| GPS | Global Positioning System |
| SAIL | Shuttle Avionics Integration Laboratory |
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