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A french mathematician named Blaise Pascal invented the first adding machine. It is a device that is driven by gears and can preform addition and subtraction.
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William Seward Burroughs developed his own adding machine which was successfully sold in stores.
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Otto Steiger invented the first adding machine that was also able to preform multiplication. "The Millionare"
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The Dalton Adding Machine is created. It was the first ten key adding machine.
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This is a miniature hand held mechanical calculator. This was one of the first innovations in mechanical calucaltors in the 20th century.
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These calculators had used vaccum tubes. These types of calculators were announced by the Bell Punch company located in England. These calculators were call Anita Mk VII.
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The first commercial all transistor desktop calulators. these were called the Friden EC130 and the IME 84
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Texas instruments starts development work on a hand held calculator .
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The first portable calucator that is battery powered, and hand held Green fluorescent tube displays are also introduced on this calculator. These calculators were all very expensive, nearly $2000
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the Intel 4004 was used in the Busicom 141-PF desk calculator
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Rapid development of electronic calucloators and reduction in price. The first scientific calculator is introduced, Hewlet Packard HP35
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The first sharp crystal on substrate reflective LCD calculators are introduced.
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Mechanical calculator manufacture in no longer available. Mass production makes electronic calculators bery cheap.
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The first solar power calculator is itroduced. These calculators were called the Teal Photon and Sharp El-8028. These were also the first credit card sized calculators.
