| Acronym | Meaning |
| LEM | Lunar Excursion Module |
| NERVA | Nuclear Engine For Rocket Vehicle Application |
| SB | Spiral |
| SR | Special Relativity |
| ER | Eastern Range |
| ESRO | European Space Research Organisation |
| CMB | Cosmic Microwave Background |
| DC | Delta Clipper |
| PCT | Photometric Calibration Test |
| NRSC | National Remote Sensing Centre |