| Acronym | Meaning |
| NEKIA | National Education Knowledge Industry Association |
| BIA | Batch Injection Analysis |
| PORG | Photochemical Oxidants Review Group |
| RDGTO | (back-)rotated Distributed Gaussian-type Orbital |
| PIRI | Photoinduced Rydberg Ionization |
| EQCIS | Electrochemical Quartz Crystal Impedance System |
| NRA | Neutron Reaction Analysis |
| GRASP | Graphical Representation And Analysis Of Structural Properties |
| RASA | Regional Aquifer Systems Analysis (program Of USGS) |
| LILE | Large-ion Lithophile Element |