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).
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.