| Acronym | Meaning |
| ESR | Erythrocyte Sedimentation Rate |
| R-CNDO/1X | Relativistic Complete Neglect Of Differential Overlap (method) |
| BPP | Bloembergen |
| LCAO CO | Linear Combination Of Atomic Orbitals Crystal Orbital |
| EDA | European Desalination Association |
| ESSESA | Expert System For Structure Elucidation From Spectral Analysis |
| SWAP | Surface Water Acidification Project |
| SEAC | Surface-enhanced Affinity Capture |
| RMA | Rocky Mountain Arsenal (Colorado) |
| OPA | Optical Parametric Amplifier |