| Acronym | Meaning |
| SENSOR | Sentinel Event Notification Systems For Occupational Risks |
| DAU | Drug Abuse Urine |
| STCA | Simplified Traveling-cluster Approxn. (for Electronic Structure) |
| ANWR | Artic National Wildlife Refuge |
| AST | Aboveground Storage Tank |
| DDIM | Dry Deposition Inferential Monitoring |
| EFV GTO | Electric-field-variant Gaussian-type Orbital |
| ACL | Alternative Concentration Limit |
| NREP | National Registry Of Environmental Professionals |
| EGO | Ellipsoidal Gaussian Orbital |