| Acronym | Meaning |
| ETO | Exponential-type Orbital |
| APOMA | American Precision Optics Manufacturers Association |
| NSF | National Sanitation Foundation |
| FBA | Fluidized Bed Afterburner |
| DHHS | Department Of Health And Human Services |
| ISP | In-line Strip Production |
| MSD | Mass Selective Detector |
| CBS-QCI | Complete Basis Set-quadratic Configuration Interaction |
| DZD | (double Zeta)-diffuse (basis Set In Configuration-mixing MO Calcns. On Mols.) |
| MERD | Mine Emergency Responsiveness Development |