| Acronym | Meaning |
| MCA | Manufacturing Chemist Association |
| QCA | Quasichemical Approxn. (in Calcns. On Semiconductors) |
| DARTAB | Dose And Risk Assessment Tabulation |
| SLMO | Symmetry-adapted Localized Molecular Orbital |
| CIPSI | Configuration Interaction Perturbing A Multiconfigurational Zeroth-order Wave Function Selected Iteratively |
| STEREO | Solar TErrestrial RElations Observatory |
| NHLBI | National Heart |
| POTW | Publicly Owned Treatment Works |
| GFF | Green Function Formalism |
| PICLS | Photoionization Controlled-loss Spectroscopy |