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ORDVAC
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==Details== * Memory uses 40 cathode ray tubes and 800 vacuum tubes,<ref name=mv1>[http://bitsavers.informatik.uni-stuttgart.de/pdf/univOfIllinoisUrbana/ordvac/ORDVAC_Manual_Volume_1_1952.pdf manual Vol 1]</ref>{{RP|1}} * Arithmetic unit uses 1100 vacuum tubes,<ref name=mv1 />{{RP|2}} * Control, uses about 500 vacuum tubes,<ref name=mv1 />{{RP|3}} Total of 2718 vacuum tubes,<ref name=mv1 />{{RP|4}} weight {{convert|3000|lb|ST MT}}.<ref>{{cite web|url=http://ed-thelen.org/comp-hist/BRL-o-s.html#ORDVAC|title=ORDVAC|last1=Weik |first1=Martin H.|date=December 1955|website=ed-thelen.org|series=A Survey of Domestic Electronic Digital Computing Systems}}</ref>
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