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There are many types of computers in terms of how they work, their size, as well as their speed. The early electronic computers were the size of a large room and consumed as power as a few hundred personal computers today.

Also, recent years have seen the costs of the hard infrastructure industry fall to the point where personal computers have become a popular commodity. Computer applications have also diversified and expanded to include various fields and devices at the present time, so the smart watch was made, and electronic navigation systems were widely applied through the Global Positioning System, and its programs and devices became accessible to everyone, and many businessmen are interested in applying them in their businesses to reduce labor and reduce production cost. Society views the personal computer (desktop computer) and its mobile counterpart (laptop) as symbolic of the information age; They are the first thing that comes to almost anyone's mind when talking about computers. However, the most widely used forms of computers today are embedded computers, which are computers that are embedded in small and simple devices that are usually used to control other devices, for example you can find them in various machines such as combat aircraft, robots, digital cameras to toys, and controllers.

It cannot be said that the computer is an invention in itself, because it was the product of many scientific innovations and mathematical applications. Computers are in fact diverse, and according to Church's assumption of the Turing machine, a computer with a low-end power would be able to perform the tasks of any other computer, from a personal digital assistant to a supercomputer, as long as time and memory capacity are not considered. Therefore, symmetrical computer designs can be tuned for tasks as simple as handling corporate employee accounts or as complex as controlling unmanned spacecraft. Because of technical development, modern computers are algebraically more powerful than earlier computers, a phenomenon described and partially explained in Moore's Law.