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  1. Wikipedia
    https://en.wikipedia.org/wiki/IBM_305_RAMAC

    IBM 305 RAMAC - Wikipedia

    • 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, 1956, 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 desig… See more

    History

    RAMAC was developed and manufactured at IBM's research facility in San Jose, California. In 1959, IBM's CEO
    The … See more

    Overview

    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… See more

    DeveloperIBM
    ManufacturerIBM
    Release dateSeptember 14, 1956
    Introductory priceUS$3,200 (equivalent to $34,700 in 2023) per month
    Architecture

    System architecture was documented in the 305 RAMAC Manual of Operation. The 305 was a character-oriented variable "word" length decimal (BCD) computer with a drum memory rotating at 6000 RPM that held 3200 alphanumeric… See more

    Hardware implementation

    The logic circuitry of the 305 was built of one- and two-tube pluggable units and relays. See more

    Related peripheral units

    A basic system was composed of the following units:
    • IBM 305 – Processing unit, the magnetic process drum, magnetic core register and electronic logical and arithmetic circuits
    • IBM 350 – … See more

    External links

    • IBM 305 RAMAC Data Processing System
    • IBM Archives on the 305
    • IBM 350 RAMAC site originally prepared under the supervision of the Storage Special Interest Group of the Computer History Museum… See more

    Wikipedia text under CC-BY-SA license
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    Overview
    Quick Facts
    Architecture
    Hardware implementation
    Related peripheral units
    See also
     

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  2. IBM
    https://www.ibm.com/history/ramac

    RAMAC - IBM

    The IBM 305 RAMAC — or simply RAMAC — was the first computer to use a random-access disk drive. The progenitor of all hard disk drives created since, it made it possible for any computer user to quickly and easily store, access, …

     
  4. Wikipedia
    https://en.wikipedia.org/wiki/History_of_IBM_magnetic_disk_drives

    History of IBM magnetic disk drives - Wikipedia

  5. Wikiwand
    https://www.wikiwand.com/en/articles/IBM_305

    IBM 305 RAMAC - Wikiwand

  6. Gizmodo
    https://gizmodo.com/ibm-305-ramac-the-grandaddy-of...

    IBM 305 RAMAC: The Grandaddy of Modern Hard Drives - Gizmodo

  7. Images of IBM 305

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  8. History of Information
    https://www.historyofinformation.com/detai…

    The IBM 305 RAMAC, the First Computer with a Hard …

    On September 14, 1956, at IBM's Glendale Laboratory in Endicott, New York, IBM demonstrated the 305 RAMAC (Random Access Method of Accounting and Control) Magnetic Drum Data Processing Machine. The machine used a …

  9. CHM
    https://www.computerhistory.org/storageengine/...

    1956: First commercial hard disk drive shipped

  10. edworking.com
    https://edworking.com/news/startups/ibm-…

    IBM 305 RAMAC & 1960 Winter Olympics: A Historic …

    Sep 3, 2024 · Embrace Historical Innovations: The IBM 305 RAMAC was groundbreaking for its time, introducing the first random-access disk drive. Understanding and appreciating past innovations can inspire new ideas and …

  11. ethw.org
    https://ethw.org/Milestones:RAMAC,_1956

    Milestones:RAMAC, 1956 - Engineering and …

    The first 350 C disk file became a commercially available product on September 4, 1956, and was a key component of the IBM 305 RAMAC system, which also included a central processor, card reader and printer.

  12. WIRED
    https://www.wired.com/2014/01/tech-time-…

    Tech Time Warp of the Week: The World's First Hard …

    Jan 3, 2014 · This seminal hard drive was part of a larger machine known as the IBM 305 RAMAC, short for "Random Access Method of Accounting and Control," and in the classic promotional video below, you can...

  13. IT History Society
    https://ithistory.org/db/hardware/ibm/ibm-305-ramac

    IBM 305 RAMAC | IT History Society

  14. YouTube
    https://www.youtube.com/watch?v=Uj0efYJaqcM

    The IBM 305 RAMAC: First Computer with a Hard Drive - YouTube

  15. YouTube
    https://www.youtube.com/watch?v=oyWsdS1h-TM

    Computer History IBM 305 RAMAC and 650 RAMAC, 1956 (350 …

  16. IBM
    https://www.ibm.com/history/lou-stevens

    Louis D. Stevens Jr. - IBM

  17. IBM
    https://www.ibm.com/history/rey-johnson

    Reynold B. Johnson - IBM

  18. CHM
    https://www.computerhistory.org/revolution/artifact/259/1044

    IBM 305 RAMAC System - CHM Revolution

  19. Indeed
    https://www.indeed.com/cmp/IBM/locations

    All IBM office locations | Indeed.com

  20. IBM
    https://www.ibm.com/careers/locations

    Locations - IBM Careers

  21. ibmring1.com
    https://www.ibmring1.com

    I.B.M. Ring 1- St Louis, MO - ibmring1.com

  22. The International Brotherhood of Magicians
    https://www.magician.org/about/local-ibm-rings?state=Missouri

    Local I.B.M. Rings - The International Brotherhood of Magicians