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{{For|topic in computer science|distributed computing|data processing}} alt=Distributed data processing|thumb|Distributed data processing '''Distributed data processing'''<ref name=NorTel.NYT>{{cite news |work=The New York Times |url=https://www.nytimes.com/1981/01/21/business/northern-telecom-s-setback.html |title=Northern Telecom's Setback |date=January 21, 1981}}</ref> (DDP)<ref>{{cite magazine |magazine=Data Communications |date=October 1977 |author=Ernest E. Keet |title=Distributed data processing: the key is software}}</ref> was the term that IBM used for the IBM 3790 (1975) and its successor, the IBM 8100 (1979). ''Datamation'' described the 3790 in March 1979 as "less than successful."<ref name=DM0379>{{cite magazine |magazine=Datamation |date=March 1979 |last= Woods |first=Larry |title= IBM's 8100: First Impressions}}</ref><ref>"(which can simulate 3790 functions through the DPCX operating system)"</ref>
Distributed data processing was used by IBM to refer to two environments: * IMS DB/DC * CICS/DL/I<ref name=DDP.Part1>{{cite magazine |magazine=Computerworld |author=Ronald G. Ross |title=IBM's Distributed Processing Capabilities For Large-Scale Data Base Systems, Part 1}}</ref><ref name=DDP.Part2>{{cite magazine |magazine=Computerworld |author=Ronald G. Ross |title=IBM's Distributed Processing Capabilities For Large-Scale Data Base Systems, Part 2}}</ref>
Each pair included a Telecommunications Monitor and a Database system.<ref name=DDP.Part1/> The layering involved a message, containing information to form a transaction, which was then processed by an application program.<ref name=DDP.Part2/> Development tools such as program validation services were released by IBM to facilitate expansion.<ref>{{cite magazine |title= The 3790: A Glimpse Into IBM's Future Plans? |author= Ronald A. Frank |magazine= Computerworld |date= July 16, 1975 |page= 15 |volume=9|issue=29 |publisher=IDG Enterprise |url= https://books.google.com/books?id=4W_8uJni4f0 |issn=0010-4841}}</ref>
Use of "a number of small computers linked to a central computer"<ref name="NorTel.NYT" /> permitted local<ref>{{cite news |work=The New York Times |url=https://www.nytimes.com/1983/06/23/business/ibm-displays-new-processor.html?pagewanted=print |title=I.B.M. Displays New Processor |date=June 23, 1983}}</ref> and central processing, each optimized at what it could best do. Terminals,<ref>{{cite news |work=The New York Times |url=https://www.nytimes.com/1981/12/11/business/motorola-to-acquire-computer-maker.html |title=Motorola to acquire computer maker |date=December 11, 1981}}</ref> including those described as ''intelligent'', typically were attached locally,<ref>{{cite news |work=The New York Times |url=https://www.nytimes.com/1979/10/21/archives/mr-fixit-of-northern-telecom.html |title=Mr. Fixit of Northern Telecom |author=Jay Bryan |date=October 21, 1979}}</ref> to a "satellite processor."<ref>{{cite book |newspaper=The New York Times |url=https://www.nytimes.com/1979/02/04/archives/to-clone-a-computer-neophyte-national-semiconductor-has-jolted-the.html |title=To Clone a Computer |author=Peter J. Schuyten |date=February 4, 1979}}</ref> Central systems, sometimes multi-processors, grew to handle the load.<ref>{{cite news |work=The New York Times |url=https://www.nytimes.com/1982/10/15/business/honeywell-s-new-computer.html |title=Honeywell's New Computer |date=October 15, 1982}}</ref> Some of this extra capacity, of necessity, is used to enhance data security.<ref>{{cite news |work=The New York Times |url=https://www.nytimes.com/1979/09/27/archives/technology-computers-and-criminals.html |title=Technology |author=Peter J. Schuyten |date=September 27, 1979}}</ref> Years before open systems made its presence felt, the goal of some hardware suppliers was "to replace the big, central mainframe computer with an array of smaller computers that are tied together."<ref>{{cite news |work=The New York Times |url=https://www.nytimes.com/1987/05/19/business/challenge-for-honeywell-bull.html |title=Challenge for Honeywell Bull |author=Steven Greenhouse |date=May 19, 1987}}</ref>
==Lower case distributed data processing== Hadoop<ref>{{cite web |date=July 14, 2010 |url=https://www.ibm.com/developerworks/library/l-hadoop-3/index.html |title=Distributed data processing with Hadoop, Part 3|website=IBM }}</ref> adds another term to the mix: File System. Tools added for this use of distributed data processing include new programming languages.
==TSI/DPF Flexicom== In 1976<ref>{{cite news |newspaper=The New York Times |url=https://www.nytimes.com/1976/11/17/archives/ibm-starting-series-1-system-to-enter-minicomputer-market.html |title=I.B.M. Starting Series 1 System To Enter Minicomputer Market |quote=DPF Inc. introduced a new data communications system called Flexicom |author=William D. Smith |date=November 17, 1976}}</ref> ''Turnkey Systems Inc'' (TSI)/DPF Inc. introduced a hardware/software telecommunications front-end to off-load some processing that handled ''distributed data processing''. Named '''Flexicom''',<ref>{{cite news |newspaper=The Irish Times |title=A Flexicom Friend |url=https://www.irishtimes.com/news/dr-solomon-succumbs-to-takeover-virus-1.163138}}</ref> The CPU was IBM-manufactured, and it ran (mainframe) DOS Rel. 26, with ''Flexicom''<nowiki />'s additions. Of four models available, the smallest had the CPU of a 360/30.<!--- omit: hardware maintenance was by Sorbus Inc. -source=WP:OR - a Flexicom seminar -->
==See also== * HPCC
==References== {{reflist}}
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Category:History of computing hardware Category:Computer-related introductions in 1975
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