Editing IBM System/370 (section)

====System/370 Model 168====
{{main|IBM System/370 Model 168}}

The '''IBM System/370 Model 168''' included "up to eight megabytes"<ref>{{cite web|url=https://www.ibm.com/ibm/history/exhibits/mainframe/mainframe_PP3168.html|title=System/370 Model 168|website=IBM Archives|date=23 January 2003|publisher=IBM|archive-url=https://web.archive.org/web/20231205223819/https://www.ibm.com/ibm/history/exhibits/mainframe/mainframe_PP3168.html|archive-date=2023-12-05|url-status=dead}}</ref> of main memory, double the maximum of 4 megabytes on the 
370/158.<ref name="IBM370.158"/>

It included dynamic address translation (DAT) hardware, a pre-requisite for the new [[virtual memory]] operating systems.

Although the 168 served as IBM's "flagship" system,<ref name=FLAG3>{{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|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> a 1975 newsbrief said that IBM boosted the power of the 370/168 again "in the wake of the Amdahl challenge... only 10 months after it introduced the improved 168-3 processor."<ref>{{cite news|newspaper=[[Computer Weekly]]|year=1975|issue=486|page=1|url=http://www.tnmoc.org/news/notes-museum/winter-19756-pages-computer-weekly|title=IBM boosts power of 370/168 again|archive-url=https://web.archive.org/web/20151208061017/http://www.tnmoc.org/news/notes-museum/winter-19756-pages-computer-weekly|archive-date=December 8, 2015}}</ref>

The 370/168 was not withdrawn until September 1980.