mainframe (redirected from Midrange computer)
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mainframe a large-scale COMPUTER with big data-storage facilities which is often accessible simultaneously from many terminals. Mainframe computers are used by large data-processing departments in businesses for sales and purchase ledger record-keeping, etc.
As MICROCOMPUTERS and MINICOMPUTERS become more powerful in terms of data-processing, speed and data-storage capacity, the distinction between the three types of computer has become blurred.