| Acronym | Meaning |
| NBO | Natural Bond Order |
| MCCEM | Multi-chamber Concentration And Exposure Model |
| RTU | Remote Terminal Unit |
| MOSIS | Metal Oxide Semiconductor Implementation Service |
| ACC | Antarctic Circumpolar Current |
| MS X(ALPHA) | Multiple-scattering X(alpha) Exchange Method |
| SCSAG | Small-curvature Semiclassical Adiabatic Ground-state (tunneling Approxn.) |
| EVAD | Electro-hydraulic Ventricular Assist Device (heart Implantable) |
| APD | Action Potential Duration |
| AIEMP | Ab Initio Embedding Model Potential |