Casio Computer Co., Ltd. (カシオ計算機株式会社 Kashio Keisanki Kabushiki-gaisha?) is a multinational electronics manufacturing company headquartered in Shibuya, Tokyo, Japan. Its products include calculators, mobile phones, cameras, musical instruments and watches. It was founded in 1946 by Tadao Kashio and Toshio Kashio. In 1957 released the world's first entirely electric compact calculator.