| Acronym | Meaning |
| HWSFC | Hazardous Waste Superfund Collection |
| MMA | Manual Metal Arc Welding |
| NPA | Natural Population Analysis (for Electron Configuration Of Mols.) |
| ZEKE | Zero Electron Kinetic Energy |
| NURP | Nationwide Urban Runoff Program (USEPA) |
| PTRI | Programmed Temperature Retention Index |
| HFB | Hartree Fock Bogolyubov |
| CIRRUS-1A | Cryogenic IR Radiance Instrumentation For Shuttle |
| ASFF | Aerated Stationary Or Submerged Fixed-film (wastewater Treatment) |
| AU | Absorbance Units |