| Acronym | Meaning |
| EFRTS | External-floating-roof Tanks |
| QHA | Quasi-harmonic Approxn. (in Intramol. Vibrational Relaxation) |
| ACFB | Atmospheric Circulating Fluidized Bed |
| APR | Air-Purifying Respirator |
| GPUCHF | Geometric Perturbed Uncoupled Hartree-Fock Method |
| DSB | Double-strand Break |
| SHOA | Second-harmonic Optical Activity |
| DDSC | Dynamic Differential Scanning Calorimetry |
| CRTA | Controlled Rate Thermal Analysis |
| NRA | National Rivers Authority (UK) |