- CACS stands for Cancer Anorexia-Cachexia Syndrome (oncology)
- CACS stands for Canadian Active Control System
- CACS stands for Center for Advanced Computer Studies
- CACS stands for Computer Audit, Control and Security
- CACS stands for Coronary Artery Calcium Scoring
- CACS stands for Criteria Air Contaminants
- CACS stands for Carrier Access Corporation (stock symbol)