| Acronym | Meaning |
| IETS | Inelastic Electron Tunneling Spectroscopy |
| NTP | Normal Temperature And Pressure |
| ESA | Energy Sudden Approxn. (in Calcns. On Reactive Scattering) |
| DTPA | Diethylenetriamine Pentaacetic Acid |
| TPSA | Total Prostate Specific Antigen |
| CIPW | Cross, Iddings, Pirrson, And Washington (for Geology Terminology) |
| DIPE | Diisopropyl Ether |
| EPICA | European Project For Ice Coring In Antarctica |
| SDA | Spray Drying Absorber |
| MIR | Maximum Individual Risk |