| Acronym | Meaning |
| NTO | Natural Transition Orbital Method (for Excited States) |
| ENMR | Electrophoretic NMR |
| BIOS | Biological Innovation For Open Society |
| AVHRR | Advanced Very High Resolution Radiometer (NASA) |
| RAS | Restricted Active Space (wave Function) |
| VASE | Variable Angle Spectroscopic Ellipsometry |
| TOTE | Tropical Ozone Transport Experiment |
| OLGA | On-Line Gas Chemistry Apparatus |
| SC-MEH-MO | Self-consistent-modified Extended Hueckel-MO |
| CHEF | Chelation Enhanced Fluorescence |