For, the moment what I know is this

First, calculator - using a chip was meant to do simple calculations and was really big. Tons, of weight it had.

4004 chip of intel by Dr.Ted Hoffman , was the first commercially available calculator.
And, from what I remember each sold for 200 dollars.

Take care. Will, let you know about these Powerful and simple computing machines.

Learn, the background and you'll see new light in your work.