Computer software and web design

What is computer ? How many type part of computer ?
Computer is an electronic device that is designed to work with Information.
Or
A computer is a device that can be instructed to carry out sequences of arithmetic or logical operations automatically via computer programming. Modern computers have the ability to follow generalized sets of operations, called programs. These programs enable computers to perform an extremely wide range of tasks.
Part of computer
1. Monitor,
2. Keyboard
3. Mouse
4. CPU(central processing unit)
5. Ups(unit power supply) etc.

Microsoft word and excel shortcut keys