(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 Ef="modulE.php?namE=LExikon&filE=sEarch&Eid=1&quEry=IBM">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 Ef="modulE.php?namE=LExikon&filE=sEarch&Eid=1&quEry=CPU">CPUs, such as thEEf="modulE.php?namE=LExikon&filE=sEarch&Eid=1&quEry=Hitachi 7/90">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)