| Acronym | Meaning |
| CPBE | Coulomb-projected Born Approxn. With Exchange |
| D.I. | Direct Injection [of Diesel Engines] |
| ABMR | Atomic Beam Magnetic Resonance |
| MCDF-EAL | Multiconfiguration Dirac-Fock-extended Average Level (for Energy Levels And Wave Functions Calcn. For Atoms) |
| LSW | Localized Spherical Wave (in Electronic Structure Calcns.) |
| ERP | Effective Refractory Period |
| FACCE | Frontal Analysis Continuous Capillary Electrophoresis |
| AISI | American Iron And Steel Institute |
| RPD | Retarding Potential Difference |
| BATHEN | Burnable Fuel Abatement Through Efficient Improvement And Nonfossil Fraction Increase |