Plug compatible: Difference between revisions

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*designed to use rebadged devices selected by such vendors
Many peripherals were originally designed to be used with a specific central processing unit (CPU)<ref>{{cite book |title=Principles of Antitrust |url= |isbn=1640200827978-1640200821 |author=Herbert Hovenkamp |date=2017}}</ref>
The term PCM was originally applied to manufacturers who made replacements for [[IBM]] peripherals.
The first example of plug compatible IBM subsystems were tape drives and controls offered by [[Telex Communications|Telex]] beginning 1965.<ref name="Pugh">{{cite book |author=Pugh |title=IBM's 360 and Early 370 Systems |page=233 |date=1991 |display-authors=etal}}</ref> [[Memorex]] in 1968 was first to enter the IBM plug-compatible disk followed shortly thereafter by a number of suppliers such as [[Control Data Corporation|CDC]],<ref>"Expected to produce $1 billion in revenues during fiscal 1980, CDC's peripherals business, advancing at 33% annually, is the fastest growing revenue producer within the company's diverse product line."{{cite news |newspaper=Computerworld |date=August 18, 1980 |page=7 |url= |title=CDC PCM Peripherals - $1 Billion market}}</ref> Itel, and [[Storage Technology Corporation]]. This was boosted by the world's largest user of computing equipment<ref>"GSA has initiated a Government-wide replace existing leased peripheral devices with lower cost plug-to-plug compatible equipment offered by independent suppliers. This program was aimed at permitting competitive offers of peripherals by independent suppliers."{{cite book |title=The Creative Partnership: Government and the Professional Services |url= |date=1973}}</ref> in both directions.<ref>"... to allow the use of IBM plug-compatible peripherals on the CDC 6400, 6600 and 7600 systems installed at the LBL Computer Center. This has given the ability to replace unreliable CDC tape drives and controllers and overpriced CDC disk drives and controllers with their IBM plug-compatible counterparts."{{cite web |title=For Reference |url=}}</ref>
Ultimately plug-compatible products were offered for most peripherals and system main memory.<ref>{{cite web|url=|title=Historical Narrative Statement of Richard B. Mancke, Franklin M. Fisher and James W. McKie, Exhibit 14971, US vs. IBM, Part 2|pages=750-796750–796|date=July 1980}}</ref>
==PCM and computer systems==