Editing IBM System/370 (section)

=====IBM 303X=====
{{main article|IBM 303X}}

The first of the initial high end machines, IBM's '''3033''', was announced March 25, 1977<ref>{{cite web|url=https://www.ibm.com/ibm/history/exhibits/3033/3033_PR01.html|title=3033 Press announcement|website=IBM Archives|date=23 January 2003|publisher=IBM|archive-url=https://web.archive.org/web/20230719145845/https://www.ibm.com/ibm/history/exhibits/3033/3033_PR01.html|archive-date=2023-07-19|url-status=dead}}</ref> and was delivered the following March, at which time a multiprocessor version of the 3033 was announced.<ref>{{cite web|url=https://www.ibm.com/ibm/history/exhibits/3033/3033_PR02.html|title=3033 Multiprocessor - Press announcement|website=IBM Archives|date=23 January 2003|publisher=IBM|archive-url=https://web.archive.org/web/20230719223056/https://www.ibm.com/ibm/history/exhibits/3033/3033_PR02.html|archive-date=2023-07-19|url-status=dead}}</ref> IBM described it as "The Big One."<ref>{{cite web|url=https://www.ibm.com/ibm/history/exhibits/3033/3033_intro.html|title=IBM's 3033 "The Big One": IBM's 3033|website=IBM Archives|date=23 January 2003|publisher=IBM|quote=''THINK'' magazine later simply dubbed it {{ndash}} "The Big One."|archive-url=https://web.archive.org/web/20230928083308/https://www.ibm.com/ibm/history/exhibits/3033/3033_intro.html|archive-date=2023-09-28|url-status=dead}}</ref>

IBM noted about the 3033, looking back, that "When it was rolled out on March 25, 1977, the 3033 eclipsed the internal operating speed of the company's previous flagship the System/370 Model 168-3 ..."<ref name=FLAG3/>

The IBM '''3031''' and IBM '''3032''' were announced Oct. 7, 1977 and withdrawn Feb. 8, 1985.<ref name="IBM.3031"/><ref>{{cite web|url=https://www.ibm.com/ibm/history/exhibits/mainframe/mainframe_PP3032.html|title=3032 Processor Complex|website=IBM Archives|date=23 January 2003|publisher=IBM|archive-url=https://web.archive.org/web/20230719144906/https://www.ibm.com/ibm/history/exhibits/mainframe/mainframe_PP3032.html|archive-date=2023-07-19|url-status=dead}}</ref>