| Acronym | Meaning |
| LEL | Lowest Effect Level |
| IDEAL | International Digital Electronic Access Library |
| DOD | Dissolved Oxygen Deficit |
| IEE | Institution Of Electrical Engineers |
| FCI | Fuel Coolant Interaction |
| MPRSA | Marine Protection |
| DIB | Diffuse Interstellar Band |
| MADIX | Macromolecular Design Via The Interchange Of Xanthates (polymn. Using Xanthates As Chain Transfer Agents) |
| ESE | Exact Static-exchange (approxn. In Scattering Calcns.) |
| CHF | Critical Heat Flux |