PC is the personal computer. In the PC you have the CPU, mother board, power supply, hard disk, operating system integrated drive electronics (IDE) controller, peripheral component interconnect (PCI) bus, sound and graphics cards. Then you have what you see the tower which holds all the components, the display monitor, mouse, keyboard and speakers. From some of the articles i have read mainframes for the most part have the same components as the PC. As one article said the main differance is the operating system. PC uses UNIX which is time-sharing, and mianframes use OS/390 which does both batch-oriented and time-sharing. Also another thing thats different is the cost differance and the speed. PC' are cost efficiant while mainframes are expensive and alot faster than PC's.
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