| Acronym | Meaning |
| WLN | Washington Library Network |
| PSNS | Pretreatment Standards For New Sources |
| HSDI | High-speed Direct Injection (of Diesel Engines) |
| NSTC | National Science And Technology Council |
| MOT | Multistate Orbital Treatment |
| WAMMAS | Waste Minimization Management Advisory System |
| APS | Advanced Photon Source |
| ALRSS | Advanced Land Remote Sensing System |
| TRRS | Time-resolved Raman Spectroscopy |
| FEL | Free Electron Laser |