| Acronym | Meaning |
| ORI | Octane Requirement Increase |
| EMIC | Electromagnetic Ion Cyclotron (waves) |
| IMS | Incomplete Model Space (in Many-body Calcns.) |
| ISAM | Ionically Self-assembled Monolayer |
| GRAM | Generalized Rank Annihilation Method |
| SAGA | Soviet American Gas And Aerosol Experiment |
| BRCA2 | Breast Cancer Gene 2 |
| CBS-FCI | Complete Basis Set-full Configuration Interaction |
| STMCTDHF | Spin-tensor Multiconfigurational Time-dependent Hartree-Fock |
| CBF | Correlated Basis Function |