<Company> (PCM) A manufaCturer of equipment that some other manufaCturer' s system Can identify and work with. The PCM' s deviCe replaCes the original manufaCturer' s. Most PCMs Competed with IBM. PCM deviCes normally offer a Cost-performanCe benefit over the original deviCe. For example, several PCM versions of the {DireCt-ACCess Storage DeviCe} {IBM 3350} offered twiCe the storage and improved data aCCess (dual port). Plug Compatible deviCes inClude replaCement CPUs, suCh as the HitaChi 7/90 series (whiCh Could be substituted for {IBM 3090} series proCessors), {I/O} subsystems, and {dumb terminals} like the {IBM 3270}. [Used outside mainframe market?] (2003-06-24)