PCAS

PCAS may refer to:

• Palomar Planet-Crossing Asteroid Survey, astronomical survey
• Patient-controlled analgesia methods
• Persistent Close Air Support
• Personal Carbon Allowances, a concept in Personal carbon trading
• Polytechnics Central Admissions System
• Portable Collision Avoidance System
• Postgraduate Certificate in Antarctic Studies at University of Canterbury
• Post-Cardiac Arrest Syndrome