| Acronym | Meaning |
| PPAR | Peroxisome Proliferator-activated Receptor |
| IOSVR | Infinite Order Sudden Vib-rotor Approximation |
| SCASA | Semiclassical Approxn. Separated Atom |
| CFM | Cubic Feet Per Minute |
| EMTIC | Emission Measurement Technical Information Center |
| AREAL | Atmospheric Research And Exposure Assessment Laboratory |
| ETA | Eigenstructure Tracking Analysis |
| SEGS | Solar Electric Generating System |
| CREG | Cross-reactive Group |
| SAW | Submerged Arc Welding |