Pocket computer is a small sized computer which is equal to a calculator size. But the function is much more equal to the large computers. There are many types of computer. They are as follows.
Tandy Pocket Computer is a small pocket computer. They are given designations from PC-1 to PC-8. This pocket computer is a scientific advancement, in which the calculator is having math functions along with that it also has some of the computer applications. This Tandy pocket computer have been included with QWERTY keyboard, which is of membrane type or of rubber type which is meant for the entering the scientific functions, math functions, programming functions.

The next type is Elektronika type which is an integrated part of many devices like calculators, electronic watches, portable games, radios etc. The next one is Panasonic which was the first to manufacture Laserdisc players in the early 1980s. There are also many other types of PC from Toshiba, Olympia, Texas.