| Acronym | Meaning |
| PCE | Tetrachloroethylene (perchloroethylene Or Perk) |
| PTRI | Programmed Temperature Retention Index |
| PEGC | Phonon Glass Electron Crystal |
| XRF | X-ray Fluorescence |
| PMP | Powder Melting Process |
| BIA | Bioelectric Impedance Analysis |
| RAP | Remedial Action Project Or Plan |
| CRF | Chromatographic Response Function |
| ORBIT | On-line Retrieval Of Bibliographic Information Timesharing |
| HPML | High-pressure Mercury Lamp |