| Acronym | Meaning |
| SCIBM | Semiclassical Infinite-barrier Model |
| HBJ | Hougen-Bunker-Johns (Hamiltonian For Mol. Calcns.) |
| CIAQ | Council On Indoor Air Quality |
| ECCES | Environmental Calculations Of Consequences From Energy Systems (model) |
| CDW | Coulomb Distorted Wave (for Scattering Calcns.) |
| PRM | Primary Reference Material |
| SU-MRCC | State Universal-multireference Coupled Cluster |
| DFA | Discontinuous Flow Analysis |
| ANPRM | Advance Notice Of Proposed Rulemaking |
| TED | Thermal Electron Detectors |