| Acronym | Meaning |
| RSR | Rapid Solidification Rate |
| CHEM | Chemical Collection Database (accessible Through OLS) |
| CI | Chemical Ionization |
| TTU | Transportable Treatment Unit |
| PCO | Perturbational Crystal Orbital |
| ATG | Derivative Thermal Anal. |
| IASAP | International Arctic Seas Assessment Project |
| CSCBS | Charge-self-consistent Band-structure (method) |
| AO | Office Of The Administrator |
| OPM | Open Path Monitors (air Pollution Sensors) |