Plug Compatible Manufacturer
Plug Compatible Manufacturer
(company)Most PCMs competed with IBM. PCM devices normally offer acost-performance benefit over the original device. Forexample, several PCM versions of the Direct-Access Storage Device IBM 3350 offered twice the storage and improved dataaccess (dual port).
Plug compatible devices include replacement CPUs, such asthe Hitachi 7/90 series (which could be substituted for IBM 3090 series processors), I/O subsystems, and dumb terminals like the IBM 3270.