| Acronym | Meaning |
| USCM | Unified Solvation Cavity Model |
| IOSH | Institution Of Occupational Safety And Health |
| NREP | National Registry Of Environmental Professionals |
| CHAMPP | Computer Hardware |
| PPD | Purified Protein Derivative |
| RSRG | Real-space Renormalization Group (method In Calcn. Of Green Functions For Electrons In Crystals) |
| CNDO/BW | Complete Neglect Of Differential Overlap With Boyd And Whitehead Parametrization |
| TPSSIMS | Temperature Programmed Static Secondary Ion Mass Spectrometry |
| KADP | Kentucky Acid Deposition Program |
| PCR | Photo-Conductive Resonance |