| Acronym | Meaning |
| ISO | Imaging Spectrometic Observatory |
| MS | Main Sequence |
| HRI | High Resolution Imager |
| PCG | Protein Crystal Growth Experiment |
| CRIM | Commercial Refrigerator Incubator Module |
| TIG | Time Of (until) Ignition |
| HLC | Heavy Lift Capability |
| SEST | Swedish ESO Submillimeter Telescope |
| MOMS | Modular Optoelectronic Multispectral/Stereo Scanner |
| IGM | InterGalactic Medium |