| Acronym | Meaning |
| PPAC | Parallel-plate Avalanche Counter |
| AWMA | Air And Waste Management Association |
| APDG | Antisymmetrized Product Of Delocalized Geminals (wave Function) |
| BATS | Biosphere-Atmosphere Transfer Scheme |
| ORV | Optical Retardation Velocity |
| MDC | Macrophage Derived Chemokine |
| NEBD | Nonequilibrium Brownian Dynamics |
| BSTR | Batch Stirred Tank Reactor |
| CSWRCB | California State Water Resources Control Board |
| ETIC | Environmental Teratology Information Center |