| Acronym | Meaning |
 | IFEA | Integrated Furnace Experiment Assembly |
| NRO | National Reconnaissance Office |
| AIPS | Astronomical Image Processing System |
| ATM | Apollo Telescope Mount (on Skylab) |
| ENAC | Energetic Neutral Atom Camera |
| PEM | Payload Electronics Module |
| PAM-D | Payload Assist Module |
| APM | Atmospheric Particle Monitor |
| MCC | Mission Control Center |
| U3P | Union Pour La Promotion De La Propulsion Photonique |
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