In the past, the way people worked was to work directly or through papers and letters to exchange. But now that is no longer true because those things are too old to keep up with the pace of human development. With the development of modern technology, the way people work has changed a lot to bring new utilities. One of the indispensable tools for most of the work that currently exists is a computer to serve the work. From a computer the size of a room, it was only possible to perform simple calculations.