| Acronym | Meaning |
| STARR | Staged Approach To Risk Reduction |
| PIC | Products Of Incomplete Combustion |
| CPF | Carcinogenic Potency Factor |
| EPZ | Emergency Planning Zone |
| ESC | Endometrial Stromal Cell |
| FCAW | Flux-cored Arc Welding |
| ESIX | Electrically Switched Ion Exchange |
| ETO | Elliptical-type Orbital |
| RAS | Restricted Active Space (wave Function) |
| CFB | Circulating Fluidized Bed |