| Acronym | Meaning |
| COSHI | Clearinghouse For Occupational Safety And Health Information |
| PAT | Proficiency Analytical Testing (NIOSH) |
| FIMS | Field Ionization Mass Spectrometry |
| ASASP | Active Scattering Aerosol Spectrometer Probe |
| EFV | Electric-field-variant Function (in CI Method) |
| BHK | Baby Hamster Kidney |
| EROD | Ethoxyresorufin-O-deethylase (REG 59793-97-4) |
| PPE | Porcine Pancreatic Elastase |
| BQMCT | Basis Quantum Monte-Carlo Theory (for Many Electron Systems) |
| ANPRM | Advance Notice Of Proposed Rulemaking |