CSU

• Airline codes-C
• Cagayan State University
• California State University
• Caraga State University
• Cardinal Stritch University
• Central South University
• Central State University
• Channel service unit
• Chari Aviation Services
• Charles Sturt University
• Charleston Southern University
• Chelyabinsk State University
• Cheng Shiu University
• Chicago State University
• Christian Social Union (UK)
• Christian Social Union in Bavaria
• Civil Service Union
• Clayton State University
• Cleveland State University
• Colorado State University
• Columbia Southern University
• Columbus State University
• Concordia Student Union
• Connecticut State University System
• Constant speed unit
• Czech Statistical Office
• Forensic science