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IBM 704
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==Reliability== The IBM 704 was much more reliable than its predecessor, the IBM 701, which had a mean time between failure of around 30 minutes. Being a vacuum-tube machine, however, the IBM 704 had very poor reliability by today's standards. On average, the machine failed around every 8 hours, comparable to the [[Manchester Mark 1]] in 1949.<ref>{{Cite web |url=https://www.rand.org/content/dam/rand/pubs/papers/2008/P7316.pdf |title=General Motors/North American Monitor for the IBM 704 Computer |last=Patrick |first=Robert L. |archive-url=https://web.archive.org/web/20210831193122/https://www.rand.org/content/dam/rand/pubs/papers/2008/P7316.pdf |archive-date=2021-08-31}}</ref><ref name="Lorenzo"/><ref name=Digital60MM1>{{cite web |title=The Manchester Mark 1 |url=http://www.digital60.org/birth/manchestercomputers/mark1/manchester.html |publisher=University of Manchester |access-date=24 January 2009 |mode=cs2 |url-status=dead |archive-url=https://web.archive.org/web/20081121112547/http://www.digital60.org/birth/manchestercomputers/mark1/manchester.html |archive-date=21 November 2008}}</ref> This limited the program size that the first [[Fortran]] compilers could successfully translate because the machine would fail before a successful compilation of a large program.<ref name="Lorenzo">{{Cite book |title=Abstracting Away the Machine: The History of the FORTRAN Programming Language (FORmula TRANslation) |last=Lorenzo |first=Mark Jones |publisher=Independently published| year=2019 |isbn=978-1082395949}}</ref>
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