WorldChanger2

WorldChanger2 - CSC 302 Computers Society The Machine that...

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The Machine that Changed the World Part 2 Kevin O'Gorman
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IBM FIRST MAGNETIC HARD DISK . 1956 IBM introduces the world's first magnetic hard  disk for data storage.  RAMAC (or Random Access Method of Accounting and Control)  offers unprecedented performance . -Produced 50 disks.  Each with a two-foot-diameter. -Produced in San Jose, California, IBM's first hard disk stored about 2,000 bits of data  per square inch and had a purchase price of about $10,000 per megabyte.  -By 1997, the cost of storing a megabyte had dropped to around ten cents. 1953 saw the development of IBM's 701 EDPM, which, according to IBM, was the first  commercially successful general-purpose computer . The 701's invention was part of the Korean War effort.  Only nineteen  701s were manufactured . The machine could be rented for $15,000 per  month.  -The first 701 went to IBM's world headquarters in New York.  -Three went to atomic research laboratories.  -Eight went to aircraft companies.  -Three went to other research facilities. 
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This note was uploaded on 10/12/2009 for the course CPE 302 taught by Professor Kevino'gorman during the Spring '09 term at Cal Poly.

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WorldChanger2 - CSC 302 Computers Society The Machine that...

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