| Acronym | Meaning |
| NEM | NAAQS Exposure Model |
| ISGO | International Structural Genomics Organization |
| HBT | Hanbury Brown Twiss (interferometry) |
| SFM | Scanning Force Microscopy |
| QTOF | Quadrupole Time-of-flight |
| IRE | Internal Reflection Element |
| ABR | Anaerobic Baffled Reactor (for Wastewater Treatment) |
| VO | Valence Orbital |
| TH | Total Hardness [of Water] |
| TFTR | Tokamak Fusion Test Reactor |