| Acronym | Meaning |
| IDP | Inosine 5'-diphosphate |
| PCILO | Perturbative Configuration Interaction Using Localized Orbitals |
| TOPSE | Tropospheric Ozone Production About The Spring Equinox |
| MTX(ALPHA) | Muffin-tin X(alpha) Statistical Exchange |
| TDR | Time Domain Reflectometer |
| ENR | Epoxidized Natural Rubber |
| HBT | Heterojunction Bipolar Transistor |
| CDWA | Continuum Distorted-wave Approxn. (for Scattering Calcns.) |
| MCP | Model Core Potential |
| CMS | Complete Model Space (in Many-body Calcns.) |