Computer hardware is the collection of physical elements that comprise a
computer system. Computer hardware refers to the physical parts or components of a computer such as monitor, keyboard, hard drive disk, mouse, printers, graphic cards, sound cards, memory, motherboard and chips, etc all of which are physical objects that you can actually touch. In contrast,
software is untouchable. Software exists as ideas,application, concepts, and symbols, but it has no substance. A combination of hardware and software forms a usable computing system.
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