| Acronym | Meaning |
| ATM | Amateur Telescope Maker |
| GPS | Global Positioning System |
| MARS | Series Of Soviet Mars Spacecraft |
| NASM | National Air And Space Museum |
| PN | Planetary Nebula |
| DSS | Deep Space Station |
| CITA | Canadian Institute For Theoretical Astrophysics |
| PM | Pressurized Module |
| SSCE | Solid Surface Combustion Experiment |
| VISSR | Visible/Infrared Spin-Scan Radiometer |