| Acronym | Meaning |
| SCOTCH | Spin Coherence Transfer In Chemical Reactions |
| AHP | Analytic Hierarchy Process |
| OIT | Oxidative Induction Time |
| SADPT | Symmetry-adapted Double Perturbation Theory |
| LOVA | Lowest-order Variational Approxn. (for Electron-phonon Interactions In Metals) |
| EGCI | Exponentially Generated Configuration Interaction |
| EIIP | Emission Inventory Improvement Program |
| NGPSA | Natural Gas Pipeline Safety Act |
| UAMO | Unprojected Alternant Molecular Orbital |
| NSSS | National Sewage Sludge Survey |