| Acronym | Meaning |
| TPD | Temperature Programmed Desorption (for Gas Chromatography) |
| EOM | Equations Of Motion Method (green's Function) |
| DMW | Dissimilar-metal Weld |
| LOESS | Locally Weighted Smoothers [in Modeling] |
| CO | Crystal Orbital |
| AIIM | Association For Information And Image Management |
| SHIV | Simian-human Immunodeficiency Virus |
| PRTD | Proportional Residence Time Distribution (of Liquid Streams In Equalization Basins In WWT) |
| HFJ | Hartree-Fock-Jucys (in Electron-correlation Corrections Calcn.) |
| HIRLAM | High Resolution Limited Area Model |