Computer hardware is the collection of physical elements that comprise a computer system.A computer system is such kind of device that is combination of the various components among them hardware and software is the most important pasts of that system. Basically a computer is the combination of hardware and software, the physically architecture or part which can be touch is called hardware components of the computer system.
A personal computer (PC) is any general-purpose computer whose size, capabilities, and original sales price make it useful for individuals, and which is intended to be operated directly by an end-user with no intervening computer operator. In contrast, the batch processing or time-sharing models allowed larger, more expensive minicomputer and mainframe systems to be used by many people, usually at the same time. Large data processing systems require a full-time staff to operate efficiently.
It is visible part like screen, keyboard, processor, motherboard, mouse, graphics card, NIC card etc. these can be compared to the physical part of the human body. Hardware components need suitable instruction to perform the particular task or problems is called command or programs.
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