| Acronym | Meaning |
 | IP | Inhalable Particle |
| ORO | Office Of Regional Operations |
| LNAPL | Light Nonaqueous Phase Liquid |
| JIS | Japan Industrial Standard |
| XIS | X-ray Isochromat Spectroscopy |
| ECRH | Electron Cyclotron Resonance Heating |
| NPO | National Program Office |
| GIPOF | Graded-Index Plastic Optical Fiber |
| HACS | Hazard Assessment Computer System |
| HETA | Hazard Evaluation Technical Assistance Branch (NIOSH) |
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