Casio Computer Co., Ltd. (カシオ計算機株式会社, Kashio Keisanki Kabushiki-gaisha?) (TYO: 6952) is a Japanese electronic devices manufacturing company founded in 1946, with its headquarters in Tokyo. Casio is best known for its calculators, audio equipment, PDAs, cameras, musical instruments, and watches. In 1957 Casio released the world''s first entirely electric compact calculator.