| Acronym | Meaning |
| OPM | Open Path Monitors (air Pollution Sensors) |
| HRE | Hormone-responsive Element |
| QDO | Quantum-defect Orbital (theory) |
| DTCI | 3,3'-diethylthiacarbocyanine Iodide |
| GEASIC | Gradient-expansion Approxn. Self-interaction Correction (functional |
| CEGB | Central Electricity Generating Board |
| ASAXS | Anomalous Small-angle X-ray Scattering |
| IPMS | Infinite Periodic Minimum Surfaces |
| PHC | Primary Hepatocellular Carcinoma |
| MCSX | Multiconfiguration Single Excitation |