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The company was founded in April 1946 by Tadao Kashio , an engineer specializing in fabrication technology. Kashio's first major product was the yubiwa pipe, a finger ring that would hold a cigarette, allowing the wearer to smoke the cigarette down to its a nub while also leaving the wearer's hands free. Japan was impoverished immediately following World War II and cigarettes were valuable, so the invention was very successful.

After seeing the electric calculators at the first Business Show in Ginza, Tokyo in 1949, Kashio and his younger brothers used their profits from the yubiwa pipe to develop their own calculators. Most of the calculators at that time worked using gears and could be operated by hand using a crank or using a motor. Kashio had some knowledge of electronics, and set out to make a calculator using solenoids. The desk-sized calculator was finished in 1954, sold for 485,000 yen and was Japan's first electronic calculator. One of the central innovations of the calculator was its adoption of the 10-key number pad; at that time other calculators were using a "full keypad", which meant that each place in the number (1s, 10s, 100s, etc...) had nine keys. Another 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.

In 1957 Casio released the Model 14-A, the world's first all-electric compact calculator. 1957 also marked the establishment of Casio Computer Co. Ltd.

1 Timeline of important product releases

• 1957 Casio releases the Model 14-A, the world's first all electric compact calculator
• 19651965 was a common year starting on Friday (the link is to a full 1965 calendar). Events January-February January 4 United States President Lyndon Johnson proclaims his " Great Society" during his State of the Union address. January 14 Prime Ministers of N The 001 calculator is released
• 19721972 is a leap year starting on Saturday (click link for calendar). Events January events January 2 the Pierre Hotel Heist Six men rob the safety deposit boxes of the Pierre Hotel in New York City. Loot is at least $4 million January 5 President of the Un The release of Casio's personal calculator, the "Casio Mini" sells for 12,800 yen and is considered an explosive hit with over 10 million sold.
• 19741974 is a common year starting on Tuesday (click on link for calendar). Events January-February January 5 Dungeons & Dragons officially released. February 4 Patricia Hearst, the 19 year old granddaughter of publisher William Randolph Hearst, is kidnapped The Casiotron, a watch that features a fully automatic calendar, including month lengths and leap years, is released.
• 19801980 is a leap year starting on Tuesday. Events January-February January 1- April 1 National steel strike in United Kingdom January 1 Changes to the Swedish Act of Succession creates Victoria of Sweden, Crown Princess over her younger brother January 5 He Casio releases their CasiotoneCasiotone refers to a series of home electronic keyboards released by Casio Computer Co. in the early 1980s. These keyboards used a sound synthesis technique known as phase distortion to approximate instrument sounds (albeit not very accurately). Most Cas musical keyboardThe musical keyboard also known as the piano keyboard is the set of adjacent depressible levers on a musical instrument which produce notes. Many musical instruments which have a key for each note lay them out in the standard way shown in the graphic: the.
• 1983Events January January 1 Beat Raaflaub became Basel Boys Choir's new conductor January 1 the ARPANET officially changes to use the Internet Protocol, creating the Internet. January 1 compulsory wearing of seat belts becomes law in the UK. January 2 The mu The first G-Shock watch, the DW-5000C, is released.
• 1995 The QV-10, the world's first digital camera that includes a TFT display, is released.