MAINFRAME

mainframe, mainframe computer

(noun) a large digital computer serving 100-400 users and occupying a special air-conditioned room

Source: WordNet® 3.1

Etymology

Noun

mainframe (plural mainframes)

(computer hardware) A large, powerful computer able to manage very many simultaneous tasks and communicate with very many connected terminals; used by large, complex organizations (such as banks and supermarkets) where continuously sustained operation is vital

Source: Wiktionary

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