| Acronym | Meaning |
| USMAR | Upflow Static-Media Anaerobic Reactor |
| PZN | Lead Zinc Niobate |
| MOT | Multistate Orbital Treatment |
| LET | Linear Energy Transfer (in Spacecraft Power Systems) |
| OSIRIS | Optical Spectrograph And IR Imaging System |
| PML | Polymer Multi Layer |
| TSLLE | Thermospray Liquid-liquid Extraction |
| SOS | Southern Oxidant Study |
| SAGE II | Stratospheric Aerosol And Gas Expt. II |
| BDTT | Brittle-to-ductile Transition Temperature |