| Acronym | Meaning |
| HAC | High Alumina Cement |
| CSIN | Chemical Substance Information Network |
| MARS | Membrane Anaerobic Reactor System |
| TENR | Technologically Enhanced Natural Radioactivity |
| CMP | Cartilage Matrix Protein |
| HESS | High Energy Stereoscopic System |
| OIRM | Office Of Information Resources Management |
| MRP | Multidrug Resistance Protein |
| AIS | Airborne Imaging Spectrometer |
| MSS | Monosulfide Solid Solution |