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NAME.. ONWUNZO PRECIOUS DEPT. . BANKING AND FINANCE COLLEGE. .SMS TITLE. LIST AND EXPLAIN 6 CATEGORIES OF COMPUTER HARDWARE. THE CENTRAL PROCESSING UNIT MAIN MEMORY SECONDARY STORAGE INPUT DEVICE OUTPUT DEVICE CONNECTING DEVICE THE CPU..This is the most important component of a computer system. It is the brain of the computer system and it determines the capacity of the computer system. All other hardware component of computer system connects to Cpu in order to carry out instructions. These other component cannot work on their own without cpu . Main memory. . It is the storage media on the motherboard. It is used to store data and instructions to be executed by the cpu. Main memory is closer to the cpu than any secondary storage device. SECONDARY STORAGE. . secondary storage device is anon-volatile device that holds data until it is deleted or overwritten. Secondary storage is about two orders of magnitude cheaper than primary storage. Consequently, hard drives (a prime example of secondary storage) are the go-to solution for nearly all data kept on today's computers. INPUT DEVICE It is a device that allow users to enter data and command into the computer system. Some of this device are keyboard, mouse, trackball, etc. OUTPUT DEVICE An output device is a hardware that present digital information in a form that human being can understand. CONNECTING DEVICE.. Connecting devices are bridges between the different parts of a document that tie all of the pieces together into one coherent package. Connecting devices show the reader how various sections of information are related, and they help keep the reader o n track with the flow of information.