•Computers can be classified by their size and power as microcomputers, minicomputers, or mainframe computers.
•Microcomputers
contain single chip CPU (microprocessor).
•Minicomputers contain CPU consists of several chips.
•Mainframes contain CPU consists of several circuit boards of chips.
•Microcomputers are single-user, single-task systems while minicomputers, and mainframe computers are multi-user and
multitasking systems.