"An electronic calculator is a small, portable, often inexpensive electronic device used to perform both basic and complex operations of arithmetic."
If you need an illustration of the accelerating speed of technological change, look no further than the electronic calculator, that modest little device that does the most complex sum instantly and that you hold in the palm of your hand.
The history of the calculator is split into two pages and has four main chapters:
1. Beginnings: The Mechanical Age
2. Business Calculator: The Electronic Age
3. Pocket Calculator: The Microchip Age
4. Calculators Now: The Virtual Age