| Acronym | Meaning |
| SR-CCD | Single Reference-CCD |
| APL | Alternative Pollutant Limits |
| OES | Optical Emission Spectroscopy |
| HMPGI | Hybrid Multiple-prism Grazing-incidence |
| CVA | Characteristic Vector Analysis |
| HTGR | High-Temperature Gas Reactor |
| MSS | Monosulfide Solid Solution |
| UA | Unequilibrated Aggregate (interplanetary Dust Particle) |
| HAV | Hepatitis A Virus |
| ECTR | Extended Connection Table Representation |