| Acronym | Meaning |
 | ASS | Antenna Support Structure |
| GRS | Gamma Ray Spectrometer |
| NTT | New Technology Telescope |
| C&T | Communications & Tracking |
| VLT | Very Large Telescope |
| ICE | International Cometary Explorer |
| COBE | COsmic Background Explorer |
| ATCS | Active Thermal Control System |
| TPS | Thermal Protection System |
| RPM | Retro Propulsion Module |
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