| Acronym | Meaning |
| PA | Preliminary Assessment |
| ASBF | Aerated Submerged Biological Filter |
| PEM | Parametric Equations Of Motion |
| MOCED | Molecular Orbital Constrained Electron Diffraction Method |
| PPM | Parts Per Million |
| AO | Office Of The Administrator |
| DASD | Direct Access Storage Device |
| SMAI | Solvated Metal Atom Impregnation |
| ALTER | Acceptable Long-term Exposure Range |
| PICT | Pollution-induced Community Tolerance |