Mainframe computers are data processing systems employed in mainly in large organizations for various applications Reference

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Mainframe computers are data processing systems employed in mainly in large organizations for various applications Reference n/mainframe-computer.html n/mainframe-computer.html

Minicomputers have been stand-alone computers (computer systems with attached terminals and other devices) Reference minicomputer minicomputer

Microcomputers are "Microcomputer" is an antiquated term that refers to a computer that uses a microprocessor (integrated circuit) for its Central Processing Unit Reference microcomputers.htm microcomputers.htm