CASIO is a Japanese multinational consumer electronics and commercial electronics manufacturing company. It was founded in 1946 by Tadao Kashio and his brothers in Tokyo, Japan. The name “CASIO” is derived from the family name of the founders.

CASIO is known for producing a wide range of electronic products, including calculators, digital watches, electronic musical instruments, cameras, projectors, label printers, cash registers, and more. The company gained significant popularity and recognition in the 1980s with the introduction of their innovative digital watches, particularly the CASIO G-Shock series, which became known for its ruggedness and durability.