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MAINFRAMES "Z" BRANDS IBM Z (renaming of System z) System z (renaming of zSeries) eServer zSeries (evolved from System/390) System/390 (followed System 370) System/370 (followed System 360) System/360 (original system) x86-BASED SERVERS "X" BRANDS (Acquired by Lenovo in 2014) System x (renaming of xSeries) eServer xSeries (renaming of Netfinity) Netfinity (renaming of PC Server) PC Server (original system) MIDRANGE BUSINESS SYSTEMS "I" BRANDS Power Systems (System i and p merged) System i (renaming of iSeries) i5 (evolution of iSeries) eServer iSeries (renaming of AS/400) AS/400 (System/38 evolution of and support for System/36) System/38 (original system) System/36 (original system) SCIENTIFIC & TECHNICAL WORKSTATIONS "P" BRANDS Power Systems (System i and p merged) System p (renaming of pSeries) p5 (evolved from pSeries) eServer pSeries (renaming of RS/6000) RS/6000 (original system)