| Acronym | Meaning |
| AAFEB | Anaerobic Attached Film Expanded Bed |
| EESI | Environment And Energy Study Institute |
| PTGS | Post-transcriptional Gene Silencing |
| LUC | Large Unit Cell Semiempirical Approxn. (for Band Structure) |
| CSEM | Coherent Self-energy Method |
| CCCO | Committee On Climatic Changes And The Ocean (of IOC And SCOR) |
| PREEN | Pacific Rim Energy And Environment Network |
| HOEF | Harmonic Oscillator With External Field Model (in Collisions) |
| AHP | Analytic Hierarchy Process |
| CRYSIS | Cryogenic Stockholm Ion Source |