| Acronym | Meaning |
| PNNL | Pacific Northwest National Laboratory |
| YFP | Yellow Fluorescent Protein |
| PQL | Practical Quantitation Levels (of Pollutants |
| GCR | Galactic Cosmic Rays (spacecraft Orbit) |
| GITR | Glucocorticoid-induced Tumor Necrosis Factor Receptor |
| UFF | Universal Force Field |
| ARAC | Acid Rain Advisory Committee |
| WQR | Waste Form Qualification Report |
| JAM | Junctional Adhesion Molecule |
| HCSEL | Horizontal Cavity Surface Emitting Laser |