| Acronym | Meaning |
| SIC | Self-interaction Correction (in Exchange-energy Calcns.) |
| ORBIT | On-line Retrieval Of Bibliographic Information Timesharing |
| DDLS | Depolarized Dynamic Light Scattering |
| EM | Enriched Mantle |
| QCT-IEQMT | Quasiclassical Trajectory-internal Energy Quantum Mechanical Threshold |
| FZP | Fresnel Zone Plate |
| VGAO | Variable Gage Atomic Orbital |
| RNAP | RNA Polymerase |
| R-GVB | Resonating-generalized Valence Bond (wave Function) |
| ETU | Ethylene Thiourea (carcinogen |