What Does Pocket Calculator Mean?
A pocket calculator is a battery-powered electronic device used to perform simple arithmetic calculations upon data input. Pocket calculators got their name owing to their compact size, which is sufficiently small and handy, and can be carried in a pocket.
Techopedia Explains Pocket Calculator
Originally, all calculators were mechanical calculators. Electronic calculators were introduced in the early 1960s, which were quite large in size due to the use of several transistors, a huge power supply and other bulky parts. Then, in early 1970s pocket calculators were developed.
