| Acronym | Meaning |
| CCM | Cyclic Cluster Model (in CNDO For Deep Levels In Solids) |
| QBM | Quantal Brownian Motion (model) |
| ICD | Implantable Cardioverter Defibrillator |
| FIM | Friable Insulation Material |
| CWISE | Coated-wire Ion-selective Electrode |
| CESQG | Conditionally Exempt Small Quantity Generator |
| API | Active Pharmaceutical Ingredient |
| MEPSAG | Minimum Energy Path Semiclassical Adiabatic Ground-state (tunneling Approxn.) |
| TOFA | Tall Oil Fatty Acids |
| CECE | Combined Electrolysis And Chemical Exchange |