| Acronym | Meaning |
| PROWL | Protein Information Retrieval Online World Wide Web Lab |
| AIH | Autoimmune Hepatitis |
| SEU | Selective Excitation Unit |
| PDF | Probability Density Function |
| PDRM | Post-depositional Remanent Magnetization |
| PPA | Pollution Prevention Act (of 1990) |
| LPA | Local Plasma Approxn. (in Calcns. Of Stopping Powers For Ions By Films) |
| DEMA | Distributed Electromechanical Actuator |
| BFBR | Biological Fluidized Bed Reactor |
| MIES | Metastable Impact Electron Spectroscopy |