| Acronym | Meaning |
| OPA | Optical Parametric Amplifier |
| FRAP | Fluorescence Recovery After Photobleaching |
| IRM | Information Resources Management |
| HAPPS | Hazardous Air Pollutant Prioritization System |
| MIRO | Mineral Industry Research Organization (UK) |
| PASTM | Photon Assisted Scanning Tunnel Microscopy |
| IRIS | Imaging Of Radicals Interacting With Surfaces |
| FIP | Full Intra-pair (spin-coupling) (wave Function) |
| RISE | Radiative Inputs From Sun To Earth |
| PTGC | Programmed-temperature Gas Chromatography |