CA

CA or ca may stand for:

• the IATA code for Air China
• C&A stores
• calcium (Ca): symbol for the chemical element
• California (State of, United States)
• Canada (ISO country code)
• Cellular automata
• Central America
• Catalan language (ISO 639 alpha-2)
• Certificate authority
• Cocaine Anonymous
• Computer Associates
• Channel America, a defunct US television network
• Chartered accountant
• Chemical Abstract
• circa
• Controlled Atmosphere
• Counter Air
• Cyanoacrylate (superglue)
• heavy cruiser (CA): hull classification symbol