| Acronym | Meaning |
| BO | Born Oppenheimer |
| CNLS | Complex Nonlinear Least Squares (data Fitting Method) |
| TFR | Transferrin Receptor |
| HMIS | Hazardous Material Identification System |
| VSMOW | Vienna Standard Mean Ocean Water |
| TWTA | Traveling Wave Tube Amplifier |
| MOLIERE (V5) | Microwave Observation LIne Estn. And Retrieval |
| IRMDR | Infrared Microwave Double Resonance |
| NLAP | Nonlimited Aeration Process (for Waste Treatment) |
| HEI | Highly Exposed Individual |