| Acronym | Meaning |
 | SNR | Signal To Noise Ratio / SuperNova Remnant |
| PAM | Payload Assist Module |
| FAP | Freedom Attached Payloads |
| ENAC | Energetic Neutral Atom Camera |
| MLI | Multi-Layer Insulation |
| SDI | Strategic Defense Initiative |
| OSCAR | Orbiting Satellite Carrying Amateur Radio |
| HMC | Halley Multicolor Camera |
| JD | Julian Date; Julian Day (Number) |
| SMC | Small Magellanic Cloud |
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