Off the theory part, computer was not invented in a single day. It is not something that is unique in its existence. The development of computer is a very long process that involves the progress in the fields of chemical, electrical, mechanical and electronic engineering. For example the development of electrical appliances and the electronic devices merged together and improved in a continuous fashion gave birth to the idea of a computer.

Initially a simple electronic calculator was developed for simple computational jobs. Later, this simple calculator was transformed into a computer in its successive improvised versions. Addition of a screen for display instead a simple calculator like LCD, addition of keyboard and mouse pointer instead of fixed buttons for input, and most importantly a micro processor for calculation marked the development of modern computers.

Vacuum tubes >> Transistor >> ICs >> VLSI and core technology and so on...

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