| Acronym | Meaning |
| FEEM | Field Electron Emission Microscopy |
| IRS | Internal Recognition Subsequence |
| AEZ | Alkaline Earth Zeolite |
| HOFF | Hybrid Orbital Force Field |
| SID | Selected Ion Detection |
| AIS | Acoustic Imaging System |
| NHRL | Northern Hemisphere Reference Line |
| HWSFC | Hazardous Waste Superfund Collection |
| FIOR | Fluid Iron Ore Reduction |
| AWPCF | Air And Water Pollution Control Facilities |