| Acronym | Meaning |
| DOUBTFUL | Double Quantum Transitions For Finding Unresolved Lines |
| BBK | Brauner-Briggs-Klar (wave Function In Atom-electron Scattering) |
| GLAS | Geoscience Laser Altimeter System |
| PEMFC | Proton Exchange Membrane Fuel Cell |
| CCCO | Committee On Climatic Changes And The Ocean (of IOC And SCOR) |
| GJIC | Gap Junctional Intercellular Communication |
| EDXRS | Energy-dispersive X-ray Spectrometry |
| DWRD | Drinking Water Research Division (EPA) |
| TBA | Tight Binding Approximation |
| VES | Vapor Extraction System |