CA may stand for: Circa (ca.) Class A California Canada People Caesar Augustus, first Roman Emperor. Carmelo Anthony, NBA player Christina Aguilera, singer and songwriter Organizations Companies Air China, IATA airline designator (CA) CA, Inc. (formerly known as Computer Associates) C&A stores Cayman Airways, airline Channel America, a defunct US television network Classic Army, a Hong Kong based manufacturer of airsoft replicas Continental Airlines, airline Creative Assembly,… (More on Ca)