Iron N. Hardware, Especially Older And Larger Hardware Of Mainframe Class With Big Metal Cabinets Housing Relatively Low-density Electronics (but The Term Is Also Used Of Modern Supercomputers).

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iron n.

Hardware, especially older and larger hardware of
mainframe class with big metal cabinets housing relatively
low-density electronics (but the term is also used of modern
supercomputers). Often in the phrase big iron. Oppose
silicon. See also dinosaur.

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