I don't know an exact year, but handheld calculators first appeared about 1973.
Desktops were several years earlier.
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scientific calculators have scientific calculations such as scientific notation, but mechanical ones dont.
Graphing calculators have the ability to see a visual representation of graphs and equations. Scientific calculators have less features and can only perform numerical mathematical equations. Graphing calculators cost around $90 while scientific calculators can be found for under $10.
On scientific calculators, the exponent key is usually [^] , [yx] , or [exp] .
The first calculator was made in Hawaii
The disadvantages of calculators is that they are no longer practical or convenient. Unless scientific in nature, most people use the calculators on their smart phones and wireless devices. While stand alone calculators are still in use, their popularity has immensely decreased across the nation.