| Acronym | Meaning |
| PAP | Pancreatitis-associated Protein |
| HWR | Heavy Water Reactor |
| PCMCIA | Personal Computer Memory Card International Association |
| REP | Relativistic Effective Potential |
| ASLE | American Society Of Lubrication Engineers (USA |
| PCE | Tetrachloroethylene (perchloroethylene Or Perk) |
| LCS | Laboratory Control Samples |
| SCEPM | Self-consistent Empirical Pseudopotential Method |
| MCRRPA | Multiconfiguration Relativistic Random Phase Approxn. |
| VRDDO | Variable Retention Of Diatomic Differential Overlap |