Casio (1s, 10s, 100s, etc ... ) had nine keys. Another distinguishing innovation was the use of a single display window instead of the three display windows (one for each argument and one for the answer) used in other calculators. Casio Computer Co., Ltd. was formed in June 1957. That year, Casio released the Model 14-A, sold for 485,000 yen, the world's first all-electric compact calculator, which was based on relay technology. In the 1980s, its budget electronic instruments and its line of affordable home electronic musical keyboard instruments became popular. The company also became well known for the wide variety
Delta Electric Company Delta Electric Company The Delta Electric Company was an American electronics manufacturer formed in 1913 in Marion, Indiana that produced lanterns, flashlights, automotive and bicycle lighting, battery tubes, horns, horn buttons, light switches, other battery-powered electrical parts, and bilge pumps. It was moved to Marion from an existing business in Chicago following a stock purchase. Delta was purchased in 1964 or 1965 by the Novo Industrial Corporation. One of Novo Industrial Corp.'s subsidiary companies, King Bee Manufacturing Co., was moved to Marion, and its line of automotive lighting and safety equipment, including headlamps, safety lights, directional lights, mirrors, and reflectors