| Acronym | Meaning |
| PIGS | Pesticides In Groundwater Strategy |
| PAWS | Portable Acoustic Wave Sensor |
| OLS | Ordinary Least Squares |
| GCO | General Coupling Operator (in Calcns. Of Vector Coupling For Atoms And Ions) |
| PTR | Photothermal Radiometry |
| PEGC | Phonon Glass Electron Crystal |
| FAO | Food And Agriculture Organization |
| MCTDH/BSE | MCTDH (with) Basis Set Expansion |
| FIBC(A) | Flexible Intermediate Bulk Container (Association) [bulk Bag] |
| ERIN | Environmental Resources Information Network |