| Acronym | Meaning |
| MMDR | Microwave-microwave Double Resonance |
| NLC | Next Linear Collider |
| FIAS | Flow Injection Atomic Spectrometry |
| LDQ | Linnett Double Quartet (equivalent To Nonpairing Spatial Orbital Theory) |
| CAEC | Center For Analysis Of Environmental Change |
| LCFA | Long Chain Fatty Acid(s) |
| CMB | Cosmic Microwave Background |
| HFFC | Hartree-Fock Frozen Core |
| PE | Population Equivalent (in Wastewater Treatment) |
| DVR-REV | Discrete Variable Representation-ray Eigenvector |