| Acronym | Meaning |
| ACQM | Arrangement-channel Quantum Mechanics |
| CNDO/SWW | Complete Neglect Of Differential Overlap/ Sichel-Whitehead-Wratten Parametrization |
| NWRI | National Water Research Institute (Burlington |
| FCCU | Fluidized Catalytic Cracking Unit |
| NASA | National Aeronautics And Space Administration |
| ALCA | American Leather Chemists' Association |
| RFA | Regulatory Flexibility Act |
| LATS | Long-Acting Thyroid Stimulator |
| CSOV | Constrained Space Orbital Variation |
| IDMS | Isotope Dilution Mass Spectrometry |