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Computer Hardware

All the components that make up the computer fall into one of the following categories: hardware and software.

Dictionary.com defines hardware as "A computer and the associated physical equipment directly involved in the performance of data-processing or communications functions" meaning that all tangible parts of your computer, ie. components that you can see and touch make up computer hardware...as simple as that.

Hardware can be further broken down into system unit (motherboard, hard disk, processor, RAM etc) and peripheral devices (keyboard, mouse etc).