processing and storages
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CPU: The central processing unit ( or cpu) is the part of a computer that interprets and carries out the instructions contained in the software.
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Hard Drive:Is a computer hardware that holds and spins a magnetic or optical disk and reads and writes information on it.
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Rom and Ram: rom is a form of data storage in computers and other electronic devices that can not be easily altered or reprogrammed and ram is a form of data storage that can be accessed randomly at any time, in any order and from any physical location.
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External memory devices:External memory is allows the permanent storage of large quantities of data.