| Acronym | Meaning |
| PPB | Parts Per Billion |
| AQRV | Air Quality Related Values |
| BCSLN-HL(N) | Bardeen-Cooper-Schrieffer-Lipkin-Nogami-Heitler-London(n) (n Is Nth-order MBPT Starting From The Self-consistent HL Model) |
| QBM | Quantal Brownian Motion (model) |
| COLD | Chronic Obstructive Lung Disease |
| ISVS | In Situ Vapor Stripping |
| DOSY | Diffusion-ordered Spectroscopy (NMR) |
| IUTOX | International Union Of Toxicology |
| BODC | Born-Oppenheimer Diagonal Correction (in Mol. Calcns.) |
| QDPT | Quasi-degenerate Perturbation Theory |