| Acronym | Meaning |
| AAU | Amendment To Allege Use |
| FPEIS | Fine Particulate Emissions Information System |
| SRXPS | Spin-resolved X-ray Photoelectron Spectroscopy |
| PAP | Pancreatitis-associated Protein |
| OTDR | Optical Time Domain Reflectometry |
| AFBC | Atmospheric Fluidized Bed Combustion |
| CAC | Carbon Arc Cutting |
| HREM | High-resolution Electron Microscopy |
| ICP | Interactive Correlation Partitioning |
| HERL/MIS | Health Effects Research Laboratory Management Information System |