| Acronym | Meaning |
| OSWER BBS | OSWER Electronic Bulletin Board System (see CLU-IN) |
| CIMI | Configuration Interaction From Molecular Integrals |
| OASLM | Optically Addressed Spatial Light Modulator |
| MDL | Method Detection Level Or Limit |
| TMP | Turbomolecular Pump |
| NPDWR | National Primary Drinking Water Regulations |
| BLIS | BACT/LAER Information System |
| TIME | Transferred Ionized Molten Energy Process (for Metal Arc Welding) |
| SRB | Sulfate Reducing Bacteria |
| NOGF | Nonorthogonal Group Function Approximation |