| Acronym | Meaning |
| CRC | Combined Residual Chlorine |
| EIA | Environmental Impact Assessment |
| NEIC | National Enforcement Investigations Center |
| ICRF | Ion Cyclotron Range Of Frequencies |
| SAAP | Spin Adapted Antisymmetrized Product (in MC-SCF Theory) |
| NCEP | National Centers For Environmental Prediction |
| CUS | Coordinatively Unsaturated Site |
| AVP | Arginine Vasopressin |
| SCPT | Self-consistent-perturbation Theory |
| UNECE | United Nations Economic Commission For Europe |