| Acronym | Meaning |
| HCA | Hazardous Communication Act |
| HTCGC | High Temperature Capillary Gas Chromatography |
| SCCM | Self-consistent Cell Model |
| PVS | Performance Verification Sample |
| EHLS | Environmental Health Laboratory Sciences |
| ETF | Exponential-type Function (an Ao) |
| GRNN | Generalized Regression Neural Network |
| FOMBT | First-order Many-body Theory |
| IOMC | Inter-Organization Program For The Sound Management Of Chemicals |
| NAPBN | National Air Pollution Background Network |