| Acronym | Meaning |
| ACL | Alternative Concentration Limit |
| MOSO | Maximum Overlap Symmetry Orbital (MO For Mols.) |
| SPIS | Surface Penning Ionization Spectroscopy |
| CLU-IN | Clean-Up Information Bulletin Board System (formerly OSWER-BBS) |
| AM | Arithmetic Mean |
| TCSM | Tropospheric Chemistry Systems Model |
| CARTS | Critical Actions Requirements Tracking System |
| CEEM | Center For Energy And Environmental Management |
| ICOM | International Congress On Membranes |
| MBTS | 2-mercaptobenzothiazyl Disulfide |