MAINFRAMES
     "Z" BRANDS

     System z (renaming of zSeries)

     eServer zSeries (evolution of System/390)

     System/390 (evolution of System 370)

     System/370 (evolution of System 360)

     System/360 (original system)


     x86-BASED SERVERS
     "X" BRANDS

     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 System p merged)

     System i (renaming of iSeries)

     i5 (evolution of iSeries)

     eServer iSeries (renaming of AS/400)

     AS/400 (System/38 evolution with
                       support for System/36)

     System/38 (original system)

     System/36 (original system)


     SCIENTIFIC & TECHNICAL WORKSTATIONS
     "P" BRANDS

     Power Systems (System i and System p merged)

     System p (renaming of pSeries)

     p5 (evolution of pSeries)

     eServer pSeries (renaming of RS/6000)

     RS/6000 (original system)