| Acronym | Meaning |
| MIS | Management Information System (OSHA) |
| TPQ | Threshold Planning Quantity |
| NDDN | National Dry Deposition Network (US EPA) |
| PSHF | Pseudospectral Hartree-Fock |
| PQC | Piezoelectric Quartz Crystal |
| AGMA | American Gear Manufacturers Association |
| ERFEN | Estudio Regional Del Fenomeno El Nino |
| SRP | Signal Recognition Particle |
| WAS | Whole Air Sampler |
| VEE | Venezuelan Equine Encephalitis |