| Acronym | Meaning |
| HUFA | Highly Unsaturated Fatty Acids |
| OES | Occupational Exposure Standard |
| RTT | Resonant Tunneling Transistor |
| IPA | Independent-pair Approximation |
| TVS | Transient Voltage Suppressor |
| EFIN | Environmental Financing Information Network |
| QECISDTQ | Quadratic Size-extensive CISDTQ |
| 2PPE | Two-photon Photoemission |
| MR-RWA | Many Resonance-rotating Wave Approxn. |
| FHCP | Federal Hazard Communication Program |