| Acronym | Meaning |
| DO | Diatomic Orbital |
| AIC | Air Information Center |
| ICP | Inductively Coupled Plasma |
| PAS | Positron Annihilation Spectrometry |
| SCEMR1 | Soil Chemical Exchange And Migration Of Radionuclides Model |
| SERON | Southern Regional Oxidant Network |
| UMP4SDTQ | Unrestricted Moeller-Plesset 4th-order (perturbation Theory With) Single |
| LT2ESWTR | Long-Term 2 Enhanced Surface Water Treatment Rule [of US EPA] |
| QSO | Quasistellar Objects |
| FCHL | Familial Combined Hyperlipidemia |