- CALAS stands for Canadian Association for Laboratory Animal Science
- CALAS stands for Centro de Acción Legal-Ambiental y Social (Guatemala)
- CALAS stands for Cryptococcal Antigen Latex Agglutination System
- CALAS stands for Countrywide Automotive Leasing Administration System (Automotive Media Systems Ltd.)
- CALAS stands for Computer-Assisted Language Analysis System
CALAS