IBM System/360 Model 40: Difference between revisions

Revision as of 06:17, 11 November 2018

Revision as of 06:19, 11 November 2018

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==History==

On April 7, 1964, IBM announced the [[IBM System/360]], to be available in six models.<ref>{{cite book|url=https://books.google.com/books?id=Bc8BGhSOawgC&pg=PA275&lpg=PA275|title=Building IBM: Shaping an Industry and Its Technology|author=Emerson W. Pugh|publisher=MIT Press|page=275|___location=Cambridge, Massachusetts|isbn=0-262-16147-8}}</ref><ref>{{cite book|title=From Mainframes to Smartphones, by |author1=Martin Campbell-Kelly, |author2=Daniel D. Garcia-Swartz; |publisher=[[Harvard University Press; {{ISBN]]|isbn=9780674729063}}</ref><ref>Fortune magazine, Sept. 1966, p.118</ref> The 360/40 was first delivered in April 1965.<ref>{{cite web|url=https://www-03.ibm.com/ibm/history/exhibits/mainframe/mainframe_FS360.html|title=System/360 Dates and characteristics|publisher=IBM}}</ref>

The [[IBM System/360 Model 30|360/30]] and the 360/40 were the two largest revenue producing [[IBM System/360#Summary of models shipped|System/360 models]],<ref name=IBMbook>{{cite book|last1=Pugh|first1=Emerson W.|last2=Johnson|first2=Lyle R.|last3=Palmer|first3=John H.|title=IBM's 360 and early 370 systems|date=1991|publisher=MIT Press|___location=Cambridge, Massachusetts|isbn=9780262161237}}</ref> accounting for over half of the units sold.<ref>An [[Automatic Data Processing|ADP]] Newsletter cited on page 56 in {{cite book|editor-last=Weiss|editor-first=Eric A.|title=Computer Usage Essentials|date=1969|publisher=McGraw-Hill|lccn=71-76142}} shows sales of the 360 Model 30 (36%) and the Model 40 (22.6%), for a total of 58.6%</ref>