mainframe

noun ! Definition from WordNet 3.1, Princeton University. Pronunciation from Wiktionary, via Kaikki.org. More about mainframe at Wordnik → Where our words come from →

1. A large digital computer serving 100-400 users and occupying a special air-conditioned room.
2. (computer science) the part of a computer (a microprocessor chip) that does most of the data processing.

   the CPU and the memory form the central part of a computer to which the peripherals are attached