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- Harvard_Mark_III abstract "The Harvard Mark III, also known as ADEC (for Aiken Dahlgren Electronic Calculator) was an early computer that was partially electronic and partially electromechanical. It was built at Harvard University under the supervision of Howard Aiken for the US Navy.The Mark III's word consisted of 16 bits. It used 5,000 vacuum tubes and 1,500 crystal diodes. It used magnetic drum memory of 4,350 words. Its addition time was 4,400 microseconds and the multiplication time was 13,200 microseconds (times include memory access time). Aiken boasted that the Mark III was the fastest electronic computer in the world.The Mark III used nine magnetic drums (one of the first computers to do so). One drum could contain 4,000 instructions and has an access time of 4,400 microseconds; thus it was a stored-program computer. The arithmetic unit could access two other drums – one contained 150 words of constants and the other contained 200 words of variables. Both of these drums also had an access time of 4,400 microseconds. This separation of data and instructions is known as the Harvard architecture. There were six other drums that held a total of 4,000 words of data, but the arithmetic unit couldn't access these drums directly. Data had to be transferred between these drums and the drum the arithmetic unit could access via registers implemented by electromechanical relays. This was a bottleneck in the computer and made the access time to data on these drums long – 80,000 microseconds. This was partially compensated for by the fact that twenty words could be transferred on each access. The Mark III was finished in September 1949 and delivered to the U.S. Naval Proving Ground at the US Navy base at Dahlgren, Virginia in March 1950.".
- Harvard_Mark_III wikiPageExternalLink index.
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- Harvard_Mark_III wikiPageRevisionID "544058496".
- Harvard_Mark_III wikiPageWikiLink Category:Electro-mechanical_computers.
- Harvard_Mark_III wikiPageWikiLink Category:Harvard_University.
- Harvard_Mark_III wikiPageWikiLink Category:One-of-a-kind_computers.
- Harvard_Mark_III wikiPageWikiLink Category:Vacuum_tube_computers.
- Harvard_Mark_III wikiPageWikiLink Dahlgren,_Virginia.
- Harvard_Mark_III wikiPageWikiLink Diode.
- Harvard_Mark_III wikiPageWikiLink Drum_memory.
- Harvard_Mark_III wikiPageWikiLink Harvard_Mark_I.
- Harvard_Mark_III wikiPageWikiLink Harvard_Mark_II.
- Harvard_Mark_III wikiPageWikiLink Harvard_Mark_IV.
- Harvard_Mark_III wikiPageWikiLink Harvard_University.
- Harvard_Mark_III wikiPageWikiLink Harvard_architecture.
- Harvard_Mark_III wikiPageWikiLink Howard_Aiken.
- Harvard_Mark_III wikiPageWikiLink Howard_H._Aiken.
- Harvard_Mark_III wikiPageWikiLink List_of_vacuum_tube_computers.
- Harvard_Mark_III wikiPageWikiLink Microsecond.
- Harvard_Mark_III wikiPageWikiLink Microseconds.
- Harvard_Mark_III wikiPageWikiLink Stored-program_computer.
- Harvard_Mark_III wikiPageWikiLink United_States_Navy.
- Harvard_Mark_III wikiPageWikiLink Vacuum_tube.
- Harvard_Mark_III wikiPageWikiLink Word_(computer_architecture).
- Harvard_Mark_III wikiPageWikiLink Word_(data_type).
- Harvard_Mark_III wikiPageWikiLinkText "Harvard Mark III".
- Harvard_Mark_III wikiPageWikiLinkText "Mark III".
- Harvard_Mark_III wikiPageWikiLinkText "Mark III/ADEC".
- Harvard_Mark_III hasPhotoCollection Harvard_Mark_III.
- Harvard_Mark_III wikiPageUsesTemplate Template:Cite_book.
- Harvard_Mark_III wikiPageUsesTemplate Template:Redirect.
- Harvard_Mark_III subject Category:Electro-mechanical_computers.
- Harvard_Mark_III subject Category:Harvard_University.
- Harvard_Mark_III subject Category:One-of-a-kind_computers.
- Harvard_Mark_III subject Category:Vacuum_tube_computers.
- Harvard_Mark_III hypernym Computer.
- Harvard_Mark_III type InformationAppliance.
- Harvard_Mark_III type University.
- Harvard_Mark_III type Class.
- Harvard_Mark_III type Computer.
- Harvard_Mark_III type Object.
- Harvard_Mark_III type University.
- Harvard_Mark_III comment "The Harvard Mark III, also known as ADEC (for Aiken Dahlgren Electronic Calculator) was an early computer that was partially electronic and partially electromechanical. It was built at Harvard University under the supervision of Howard Aiken for the US Navy.The Mark III's word consisted of 16 bits. It used 5,000 vacuum tubes and 1,500 crystal diodes. It used magnetic drum memory of 4,350 words.".
- Harvard_Mark_III label "Harvard Mark III".
- Harvard_Mark_III sameAs Harvard_Mark_III.
- Harvard_Mark_III sameAs Harvard_Mark_III.
- Harvard_Mark_III sameAs m.06v6_s.
- Harvard_Mark_III sameAs Q5676506.
- Harvard_Mark_III sameAs Q5676506.
- Harvard_Mark_III wasDerivedFrom Harvard_Mark_III?oldid=544058496.
- Harvard_Mark_III isPrimaryTopicOf Harvard_Mark_III.