| CLAS | California Learning Assessment System 
| Others |
| CLAS | California Leave Accounting System
| Others |
| CLAS | Campus Learning Assistance Services
| Others |
| CLAS | Cancer Linear Analog Scale
| Others |
| CLAS | CEBAF Large Acceptance Spectrometer
| Others |
| CLAS | Center for Latin American Studies
| Others |
| CLAS | Center for Learning and Academic Success
| Others |
| CLAS | Center for Learning Arthroscopic Skills
| Others |
| CLAS | Center for Local Aid Support
| Others |
| CLAS | Center Level Application Software
| Others |
| CLAS | Challenging Leadership Adventure System
| Others |
| CLAS | Civil Legal Aid Scheme
| Others |
| CLAS | Clayton Loan Analysis System
| Others |
| CLAS | Clean Linear Algebra Subroutines
| Others |
| CLAS | Clinical Ligand Assay Society
| Others |
| CLAS | Closed Loop Action System
| Others |
| CLAS | Club Clasicos Santander
| Others |
| CLAS | Colby Liberal Arts Symposium
| Others |
| CLAS | College of Liberal Arts and Sciences
| Others |
| CLAS | Common LISP Aspect System
| Others |
| CLAS | Commonwealth Legal Advisory Service
| Others |
| CLAS | Community Legal Assistance Society
| Others |
| CLAS | Community Lending Analysis System
| Others |
| CLAS | Compressive Loudness Audio Shaping
| Others |
| CLAS | Concentrated Lactic Acid Sourdough
| Others |
| CLAS | Congenital Localized Absence Of Skin
| Others |
| CLAS | Consortium in Latin American Studies
| Others |
| CLAS | Content Labelled Attachment Score
| Others |
| CLAS | Council for Leaders in Alabama Schools
| Others |
| CLAS | Culturally and Linguistic Appropriate Services
| Others |
| CLAS | Culturally and Linguistically Appropriate Services
| Others |
| CLAS | Culture and Language Assistance Standards
| Others |