| Acronym | Meaning |
| PAO | Polarized Atomic Orbital |
| PAP | Prostatic Acid Phosphatase |
| GLP | Good Laboratory Practices (US FDA) |
| ACMP | Advisory Committee On Marine Pollution (ICES) |
| MSG | Monosodium Glutamate |
| TSI | Trophic State Index |
| TRACECA | Transport Corridor Europe Caucasus Asia |
| GBA | Generalized Born Approxn. |
| CARER | Center For The Advancement Of Radiation Education And Research |
| RCCSD | (partially) Restricted CCSD |