| Acronym | Meaning |
| PAR | Photosynthetically Active Radiation |
| LCF | Low-cycle Fatigue |
| RCSB | Research Collaboratory For Structural Bioinformatics |
| JPDR | Japan Power Demonstration Reactor |
| HNPCC | Hereditary Nonpolyposis Colorectal Carcinoma |
| VAZC | Vibrationally Adiabatic Zero Curvature (quantum Calcn. Approxn.) |
| PAM | Periodic Anderson Model |
| EMAIL | Electronic Mail |
| CHA | Concept Hazard Analysis |
| RCI | Restricted Configuration Interaction |