| Acronym | Meaning |
| I-TEQ | International Toxic Equivalent |
| APT | Atomic Polar Tensor (in Ir Spectra Calcn.) |
| FARM | Fixed-angle Reactor Model (in Quantum Calcns. On Reactive Scattering) |
| PPBA | Plane-wave Plane-wave Born Approximation |
| DBRA | Division Of Biometry And Risk Assessment |
| RSSCT | Rapid Small-scale Column Test (of Granulated Activated Carbon) |
| DIVAH | Diagonally Corrected Vibrationally Adiabatic Hyperspherical (theory In Scattering Calcns.) |
| SC-MBPT | Single-configuration Many-body Perturbation Theory |
| CISTI | Canadian Institute For Scientific And Technical Information |
| ECMWF | European Center For Medium Range Weather Forecast |