| Acronym | Meaning |
| OPDIN | Ocean Pollution Data And Information Network |
| PTM | Perturbation Trajectory Method (in Gas-surface Collision Dynamics) |
| ERT | Effective-range Theory (in Mol. Calcns.) |
| BSWKB | Broken Supersymmetric Wentzel-Kramers-Brillouin |
| DGS | DiGeorge Syndrome |
| AAR | Accumulation-area Ratio (for Glaciers) |
| CAFBR | Ceramic Filled Anaerobic Fixed Bed Reactor |
| SWAG | Simulated Waste Access To Groundwater |
| SR-CCSD | Single Reference-CCSD |
| GWDR | Ground Water Disinfection Rule |