DBpedia – Linked Data Fragments

Matches in DBpedia 2016-04 for { <http://wikidata.dbpedia.org/resource/Q980941> ?p ?o }

• Q980941 subject Q8148229.
• Q980941 subject Q8529943.
• Q980941 abstract "The IBM 305 RAMAC was the first commercial computer that used a moving-head hard disk drive (magnetic disk storage) for secondary storage. The system was publicly announced on September 14, 1958, with test units already installed at the U.S. Navy and at private corporations. RAMAC stood for "Random Access Method of Accounting and Control", as its design was motivated by the need for real-time accounting in business.The first RAMAC to be used in the U.S. auto industry was installed at Chrysler's MOPAR Division in 1957. It replaced a huge tub file which was part of MOPAR's parts inventory control and order processing system. The 305 was one of the last vacuum tube computers that IBM built. It weighed over a ton. The IBM 350 disk system stored 5 million alphanumeric characters recorded as 6 data bits, 1 parity bit and one space bit for 8 bits recorded per character. It had fifty 24-inch-diameter (610 mm) disks. Two independent access arms moved up and down to select a disk, and in and out to select a recording track, all under servo control. Average time to locate a single record was 600 milliseconds. Several improved models were added in the 1950s. The IBM RAMAC 305 system with 350 disk storage leased for US$3,200 per month in 1957 dollars, equivalent to a purchase price of about $160,000. More than 1,000 systems were built. Production ended in 1961; the RAMAC computer became obsolete in 1962 when the IBM 1405 Disk Storage Unit for the IBM 1401 was introduced, and the 305 was withdrawn in 1969.The original 305 RAMAC computer system could be housed in a room of about 9 m (30 ft) by 15 m (50 ft); the 350 disk storage unit measured around 1.5 square metres (16 sq ft). The first hard disk unit was shipped September 13, 1956. The additional components of the computer were a card punch, a central processing unit, a power supply unit, an operator's console/card reader unit, and a printer. There was also a manual inquiry station that allowed direct access to stored records. IBM touted the system as being able to store the equivalent of 64,000 punched cards.Programming the 305 involved not only writing machine language instructions to be stored on the drum memory, but also almost every unit in the system (including the computer itself) could be programmed by inserting wire jumpers into a plugboard control panel.During the 1960 Olympic Winter Games in Squaw Valley (USA), IBM provided the first electronic data processing systems for the Games. The system featured an IBM RAMAC 305 computer, punched card data collection, and a central printing facility.Currie Munce, research vice president for Hitachi Global Storage Technologies (which has acquired IBM's hard disk drive business), stated in a Wall Street Journal interview that the RAMAC unit weighed over a ton, had to be moved around with forklifts, and was delivered via large cargo airplanes. According to Munce, the storage capacity of the drive could have been increased beyond five megabytes, but IBM's marketing department at that time was against a larger capacity drive, because they didn't know how to sell a product with more storage.".
• Q980941 thumbnail BRL61-IBM_305_RAMAC.jpeg?width=300.
• Q980941 wikiPageExternalLink IBM+350+RAMAC.
• Q980941 wikiPageExternalLink inflation_calculator.htm.
• Q980941 wikiPageExternalLink IBM-305-RAMAC.
• Q980941 wikiPageExternalLink storage_PH0305.html.
• Q980941 wikiPageWikiLink Q1066933.
• Q980941 wikiPageWikiLink Q1137429.
• Q980941 wikiPageWikiLink Q1332857.
• Q980941 wikiPageWikiLink Q164746.
• Q980941 wikiPageWikiLink Q174053.
• Q980941 wikiPageWikiLink Q181114.
• Q980941 wikiPageWikiLink Q183414.
• Q980941 wikiPageWikiLink Q206037.
• Q980941 wikiPageWikiLink Q2067979.
• Q980941 wikiPageWikiLink Q2712755.
• Q980941 wikiPageWikiLink Q272683.
• Q980941 wikiPageWikiLink Q276582.
• Q980941 wikiPageWikiLink Q304444.
• Q980941 wikiPageWikiLink Q3574371.
• Q980941 wikiPageWikiLink Q420105.
• Q980941 wikiPageWikiLink Q4741052.
• Q980941 wikiPageWikiLink Q4811222.
• Q980941 wikiPageWikiLink Q5359789.
• Q980941 wikiPageWikiLink Q55813.
• Q980941 wikiPageWikiLink Q5968648.
• Q980941 wikiPageWikiLink Q5968827.
• Q980941 wikiPageWikiLink Q625502.
• Q980941 wikiPageWikiLink Q640815.
• Q980941 wikiPageWikiLink Q649900.
• Q980941 wikiPageWikiLink Q737372.
• Q980941 wikiPageWikiLink Q766483.
• Q980941 wikiPageWikiLink Q775196.
• Q980941 wikiPageWikiLink Q7850689.
• Q980941 wikiPageWikiLink Q8148229.
• Q980941 wikiPageWikiLink Q839647.
• Q980941 wikiPageWikiLink Q844783.
• Q980941 wikiPageWikiLink Q8529943.
• Q980941 wikiPageWikiLink Q908463.
• Q980941 wikiPageWikiLink Q9634.
• Q980941 wikiPageWikiLink Q964035.
• Q980941 comment "The IBM 305 RAMAC was the first commercial computer that used a moving-head hard disk drive (magnetic disk storage) for secondary storage. The system was publicly announced on September 14, 1958, with test units already installed at the U.S. Navy and at private corporations. RAMAC stood for "Random Access Method of Accounting and Control", as its design was motivated by the need for real-time accounting in business.The first RAMAC to be used in the U.S.".
• Q980941 label "IBM 305 RAMAC".
• Q980941 depiction BRL61-IBM_305_RAMAC.jpeg.