![]() It is also possible to use the keys in “shift” and “alpha” modes to carry out different functions or enter alphabetic characters. In addition, it has keys for a wide array of mathematical functions, including square roots, squares, logarithms, natural logarithms, inverses, sines, cosines, tangents, powers, and roots. As with earlier calculators, it includes a ten-digit array of keys for entering numbers, a decimal point key, four arithmetic function keys, a delete (clear entry) key, and an all clear key. The sides of the calculator are black plastic, with a metal keyboard and back. Object Details date made ca 1985 maker Casio Computer Company Description This is an example of the first commercially sold handheld graphing electronic calculator, introduced by Casio in 1985. ![]()
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