Parallel Enterprise Server
A family of S/390 (System/390) mainframes from IBM that are air cooled and use CMOS-based microprocessor technology (CPU on one chip). Introduced in 1994 as the 9672 series, Parallel Enterprise Servers rapidly replaced the earlier water-cooled, bipolar machines that were considerably larger and more power hungry.Parallel Enterprise Servers employ symmetric multiprocessing (SMP) and up to 32 servers can be tied together in a Parallel Sysplex cluster. See IBM mainframes and Parallel Sysplex.
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| S/390 G4 Model |
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| IBM's air-cooled, CMOS-based mainframes hardly resemble the huge water-cooled, bipolar models. (Image courtesy of International Business Machines Corporation. Unauthorized use not permitted.) |
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