| Acronym | Meaning |
 | LM | Lunar Module |
| GRO | Gamma Ray Observatory |
| ATMOS | Atmospheric Trace Molecule Spectroscopy |
| HPFTP | High Pressure Fuel Turbopump |
| NLDP | National Launch Development Program |
| FFCC | Free-Flyer Control Centre |
| GSFC | Goddard Space Flight Center |
| ML | Mobile Launcher |
| APT | Automatic Picture Transmission |
| NSA | National Security Agency |
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