| Acronym | Meaning |
| CWA | Clean Water Act |
| H-CI | Hylleraas-configuration Interaction |
| ISX | Insoluble Starch Xanthate (ion Exchanger For Wastewater Treatment) |
| MMR | Mismatch Repair |
| GAO | General Accounting Office |
| GPS | Generalized Phase Shift Formalism |
| MR-MBPT | Multireference-many-body Perturbation Theory |
| PTMG | Polytetramethylene Glycol |
| NMAM | NIOSH Manual Of Analytical Methods |
| EOX | Extractable Organic Halides |