A calculator, at least the modern ones, are devices that will "crunch numbers" and find answers to mathematical processes we instruct them to undertake. They have programs that they run to perform mathematical operations on command (but according to their limits). A pencil is a writing device that we must power up with our body and our mind.
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A graphing calculator is a scientific calculator with a graphing display window. Otherwise, there are no limits to the type of calculations that can be made on either of them.
difference between present day calculator and leibniz calculator
-- Multiply radians by ( 180/pi ) to get degrees. -- Multiply degrees by ( pi/180 ) to get radians. This technique works with any brand of calculator. Also with computers, Curta, pencil and paper, and slide rules.
The t1-84+ has the addition of a usb cable and preloaded apps.
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