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- IBM_608 abstract "The IBM 608 Transistor Calculator a plugboard-programmable unit, was the first IBM product to use transistor circuits without any vacuum tubes and is believed to be the world's first all-transistorized calculator to be manufactured for the commercial market. The 608 contained more than 3,000 germanium transistors. Announced in April 1955, it was released in December 1957. It was similar in nature of operation to the vacuum tube IBM 604, which had been introduced a decade earlier. Although the 608 outpaced its immediate predecessor, the IBM 607 by a factor of 2.5, it was soon rendered obsolete by newer IBM products and only a few dozen were ever delivered. The 608 was withdrawn from marketing in April 1959.The use of transistors was a significant departure from the previous IBM calculators of this line. The 608 also used magnetic core memory, but was still programmed using a control panel. The main memory of the 608 could store 40 nine-digit numbers, and it had an 18-digit accumulator. In raw speed terms, it could perform 4,500 additions per second, it could multiply two nine-digit numbers, yielding an 18-digit result in 11 milliseconds, and it could divide an 18-digit number by a nine-digit number to produce the nine-digit quotient in 13 milliseconds. The 608 could handle 80 program steps.The 608 was supplied with a type 535 card reader/punch which had its own control plugboard.To spur the adoption of transistor technology, shortly before the first IBM 608 shipped, Tom Watson directed that a date be set after which no new vacuum-tube-based products would be released. This decision constrained IBM product managers, who otherwise had the latitude to select components for their products, to make the move to transistors. As a result, the successor to the IBM 650 used transistors, and it became the IBM 7070—the company's first transistorized stored-program computer.The chief designer of the circuits used in the IBM 608 was Robert A. Henle, who later oversaw the development of emitter-coupled logic (ECL) class of circuits. The development of the 608 was preceded by the prototyping of an experimental all-transistor version of the 604. Although this was built and demonstrated in October 1954, it was not commercialized.".
- IBM_608 wikiPageExternalLink 22-6666-0_608prelim_Nov55.pdf.
- IBM_608 wikiPageID "27173454".
- IBM_608 wikiPageLength "3780".
- IBM_608 wikiPageOutDegree "21".
- IBM_608 wikiPageRevisionID "699249100".
- IBM_608 wikiPageWikiLink Category:1957_introductions.
- IBM_608 wikiPageWikiLink Category:History_of_electronic_engineering.
- IBM_608 wikiPageWikiLink Category:IBM_transistorized_computers.
- IBM_608 wikiPageWikiLink Category:IBM_unit_record_equipment.
- IBM_608 wikiPageWikiLink Category:Programmable_calculators.
- IBM_608 wikiPageWikiLink Emitter-coupled_logic.
- IBM_608 wikiPageWikiLink Germanium.
- IBM_608 wikiPageWikiLink History_of_IBM.
- IBM_608 wikiPageWikiLink IBM_604.
- IBM_608 wikiPageWikiLink IBM_607.
- IBM_608 wikiPageWikiLink IBM_650.
- IBM_608 wikiPageWikiLink IBM_7070.
- IBM_608 wikiPageWikiLink Magnetic-core_memory.
- IBM_608 wikiPageWikiLink Plugboard.
- IBM_608 wikiPageWikiLink Robert_A._Henle.
- IBM_608 wikiPageWikiLink Stored-program_computer.
- IBM_608 wikiPageWikiLink Thomas_Watson_Jr..
- IBM_608 wikiPageWikiLink Transistor.
- IBM_608 wikiPageWikiLink Unit_record_equipment.
- IBM_608 wikiPageWikiLink Vacuum_tube.
- IBM_608 wikiPageWikiLinkText "IBM 608 Calculator".
- IBM_608 wikiPageWikiLinkText "IBM 608".
- IBM_608 wikiPageUsesTemplate Template:Reflist.
- IBM_608 wikiPageUsesTemplate Template:Rp.
- IBM_608 subject Category:1957_introductions.
- IBM_608 subject Category:History_of_electronic_engineering.
- IBM_608 subject Category:IBM_transistorized_computers.
- IBM_608 subject Category:IBM_unit_record_equipment.
- IBM_608 subject Category:Programmable_calculators.
- IBM_608 hypernym Product.
- IBM_608 type Software.
- IBM_608 type Product.
- IBM_608 comment "The IBM 608 Transistor Calculator a plugboard-programmable unit, was the first IBM product to use transistor circuits without any vacuum tubes and is believed to be the world's first all-transistorized calculator to be manufactured for the commercial market. The 608 contained more than 3,000 germanium transistors. Announced in April 1955, it was released in December 1957. It was similar in nature of operation to the vacuum tube IBM 604, which had been introduced a decade earlier.".
- IBM_608 label "IBM 608".
- IBM_608 sameAs Q9006325.
- IBM_608 sameAs IBM_608.
- IBM_608 sameAs IBM_608_Transistor_Calculator.
- IBM_608 sameAs m.0bwgrdx.
- IBM_608 sameAs Q9006325.
- IBM_608 wasDerivedFrom IBM_608?oldid=699249100.
- IBM_608 isPrimaryTopicOf IBM_608.