| Acronym | Meaning |
| SRT | Sludge Or Solids Retention Time |
| PUHF | (spin)-projected Unrestricted Hartree-Fock |
| PDEA | Preliminary Draft Environmental Assessment |
| HAMS | Helium Atoms Measurement System |
| TNF | Tumor Necrosis Factor-alpha |
| SOTE | Standard Oxygen Transfer Efficiency (of Aeration Diffusers) |
| EMI | Enriched Mantle Component 1 (of S. R. Hart |
| SSC | Sudden Storm Commencement (magnetic Storm) |
| ZOAO | Zero Overlap Of Atomic Orbital Approxn. |
| DOBAMBC | P-(n-(decyloxybenzylidene)-p-amino-(2-methylbutyl) Cinnamate |