| Acronym | Meaning |
| HCV | Hepatitis C Virus |
| AWM | Abrasive Waterjet Machining |
| PISA | Pair Interaction Structureless Approximation |
| PPMSVX | Pseudopotential Multiple-scattering Valence-exchange |
| KBDS | Knowledge-based Design System |
| ICZN | International Commission On Zoological Nomenclature |
| TWSM | Two-way Shape Memory |
| TCD | Thermal Conductivity Detector (for Gas Chromatography) |
| CAAA | Clean Air Act Amendments (of 1990) |
| NIWR | National Institute For Water Research (South Africa) |