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Mechanical Calculator
The first mechanical calculator was invented by in 1642, by Blaise Pascal, a french mathematician. It used metal gears for its internal parts. It could do the four basic functions of adding, subtracting, multiplying, and dividing. https://www.educalc.net/196488.page http://www.cs.nott.ac.uk/~pszcah/ComputerXHistory/EarlyHistory/1700-PascalCalculator.HTM -
Computer Calculator
The first computer calculator or electronic calculator was made called the ENIAC. It was hundreds of times faster than the older versions. One drawback was it took up an entire room's worth of space and over a couple buildings' worth of electricity. http://www.computerhistory.org/revolution/birth-of-the-computer/4/78 -
First Electronic Desktop Calculator
The first calculator used on a desktop was called Anita. It was created in the UK. It had a 12 place display. http://www.thecalculatorsite.com/articles/units/history-of-the-calculator.php?page=2 -
Texas Instruments
TI created their "CaL Tech" prototype which allowed the user to the four basic function and the results were printed on a thin paper. The thing that made this prototype special was that it was small enough to be held in the hand. http://www.thecalculatorsite.com/articles/units/history-of-the-calculator.php?page=2 -
Graphing Calculators
In 1985 Casio created the first graphing calculator. It is the foundation to the modern graphic calculator so it is obsolete compared to the modern ones. http://www.computinghistory.org.uk/det/6045/Casio-fx-7000G-graphing-calculator/ -
Phone Calculator
The first phone with a calculator was the BellSouth/IBM Simon Personal Communicator invented in 1993. http://www.thecalculatorsite.com/articles/units/history-of-the-calculator-2.php?page=2 -
Modern Day Calculators
Nowadays calculators are much stronger, faster, more accurate, and have many more functions. We have calculators on smartphones that are much stronger than the older ones and even stronger actual calculators. They make the previous calculators obsolete.
