| Acronym | Meaning |
| WPCR | Water Pollution Control Research (US EPA) |
| AFIS | Advanced Fiber Information System |
| ESFF | Extensible Systematic Force Field |
| SNCR | Selective Noncatalytic Reduction |
| MMSV | Morse-Morse-Spline-van Der Waals (potential Function) |
| LDA | Linear Diode Array |
| IMF | Intermediate Mass Fragment |
| SDTQ-MBPT | Single-double-triple-quadruple Excitation (contribution) MBPT |
| L2 | Square Integrable (wave Function) (in Electron-atom Or -mol. Collisions) |
| AQTAD | Air-Quality Technical Assistance Demonstration |