Clas or CLAS may refer to:
- Clas (given name)
- Clas (ecclesiastical settlement), a medieval church in Wales
- CLAS (education), a standards-based assessment used in California
- CLAS detector, the CEBAF Large Acceptance Spectrometer at the Thomas Jefferson National Accelerator Facility
- CESG Listed Advisor Scheme, a system of IT Security specialists working on government computer systems in the UK
- University of Florida College of Liberal Arts and Sciences
- University of Iowa College of Liberal Arts and Sciences
- Center for Latin American Studies - University of Pittsburgh
- Community Legal Assistance Society, a legal aid office in Vancouver, British Columbia.
- Conjugated linoleic acids
This disambiguation page lists articles associated with the title Clas.
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