Types of computers

The concept computer

Starts with computer definition of the word, the word (computer) is an English word derived from the English verb (compute), which means (calculated), and when translated into Arabic, the authors take the words that show them in the Arabic language were: Computer-mail, or mind-mail, it was last month naming him is a computer or a computer as pronounced in English.

Computer is defined as an electronic device used to process the data through logical and mathematical automated manner that operations, not humans interfere in it only through the command input, and this is done when it receives computer data and information device, and then processed, and finally saved and show the user to be easy for him to understand.
Computer Components software
Remember: It is no information has been written in a way that the computer can handle it; The information that go into a computer and can not be handled by the
Deemed as the data for him.
Treatment: a phase in which the data is converted or changed into a form the computer can understand it.
Storage: a process that Remember where for retrieval at a later time, called the computer's memory.
Networks: a method that connects a group of computers with each other to be able to share information among themselves.
Types of computers
PC: a desktop computer hardware that was designed in 1981 by IBM Corporation and then have a lot of computer companies to produce desktop computers, but they were all similar devices with the IBM
main frame computer: It is a great device powerful works to support many users at the same time, and often used in shops and large enterprises that need to mainframe computer.
PC (macintosh) Macintosh: a name to a desktop differs from the IBM operating system that it differs in its programs and has also own.
Notebook computer (laptop): a computer that can be carried; because it is very mild compared with previous devices, and make it in the portable base is that it has a rechargeable battery can be to operate for several hours without a plug into the plug electrode, which is very fast, but slower than the PC desktop few percent is negligible.
Server computer (server): an ordinary computer, such as desktop computers, and have a central server is for the rest of the computers, and be very large capacity compared to other devices connected through it; because it is used in different units of the CPU.
Personal data assistant: a computer is too small can be carried by hand, which is much smaller than a laptop, and is often used to save important addresses and appointments, and has a battery shipped which can work for long hours, then the user needs to ship this type only once a day , it can run for more than 12 consecutive hours, which is more expensive than laptop because of its small size, and easy to use, and is often used by business