Texas Instruments invented the first calculator in 1967
I was looking to see how much they cost, as my dad gave me one around 1972 or 1973. I know, because I moved from that house that year. I was 7. We didn't have money, so I KNOW we didn't pay $135 for it! Anyway, I finally found this info on this Hewlett Packard website:
http://h20331.www2.hp.com/Hpsub/cache/457008-0-0-225-121.html
"When the HP-35 was introduced, there were 75 handheld calculators on the market from more than 20 manufacturers. All of these were four-function calculators and could only add, subtract, multiply and divide. From 1972 to 1976, four-function calculator prices fell 95 percent - plummeting from an average of $195 to just $9.95. Falling prices unseated a number of calculator brands."
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I don't know an exact year, but handheld calculators first appeared about 1973. Desktops were several years earlier.
The first calculator was made in Hawaii
abicuss
The first calculator dates back to 2700 BC with the invention of the Abacus, invented in Mesopotamia.In the 1940's and 1950's, the first mainframe computers were invented, which led towards the hand-held calculators we know today.In the mid-1960's, desktop calculators were coming to fruition, and in 1970, the first "Pocket" calculator was invented in Japan by Sanyo, called the ICC 0081.
Calculators have changed drastically the first calculator was an abacus. The Arithmometer (1820) was for add, subtract, multiply, and divide. The Odhner (1875) was made by Odhner who invented a pinwheel calculator which used a hand crank to complete the computation. The Comptometer (1885) was made by Felt, he invented the first calculator using keys to push for number entry and calculations. The Standard calculator (1901) was made by Hopkins who used two rows of five buttons representing the digits 0 through 9 to perform math computations. The standard ten digit keyboard (1911) we use today was made by Sundstrand who brought the design from Sweden to the United States. The first commercial calculators (1914) began entering businesses and the use of calculators began to be popular. We have been modifying calculators a little at a time since then.