Editing IBM 305 RAMAC (section)

{{Short description|First computer to use magnetic disk storage}}
{{Infobox information appliance
| name = IBM 305 RAMAC
| title = 
| aka = 
| logo = IBM Logo 1947 1956.svg
| logo_size = 120px
| image = IBM 305 RAMAC system (1).jpg
| caption = IBM 305 RAMAC system:

IBM 305 main system (Processing unit, magnetic process drum, magnetic core register, electronic logical and arithmetic circuits){{br}}
[[IBM 370 printer]] (left), IBM 380 console (right)
| developer = [[IBM]]
| manufacturer = [[IBM]]
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| release date = {{Start date and age|1956|09|14}}
| retail availability = 
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| price = {{US$|3200|1957|round=-2}} per month
| discontinued = 1961
| units sold = More than 1,000
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| memory = 
| storage = 3.75 megabytes
| memory card = 
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| predecessor = 
| successor = [[IBM 1401]]
| related = 
| website = {{URL|https://www.ibm.com/history/ramac}}
| image_size = 270px
}}
The '''IBM 305 RAMAC''' was the first commercial computer that used a moving-head [[hard disk drive]] (magnetic [[disk storage]]) for [[secondary storage]].<ref>{{cite news | url=http://www.eweek.com/c/a/Data-Storage/IBM-Builds-on-50-Years-of-Spinning-Disk-Storage/ | title=IBM Builds on 50 Years of Spinning Disk Storage | first=Chris | last=Preimesberger | publisher=eWeek.com | date=2006-09-08 | access-date=2012-10-16}}</ref> The system was publicly announced on September 14, 1956,<ref name="RAMACAnn">[https://web.archive.org/web/20050311064141/http://www-03.ibm.com/ibm/history/exhibits/650/650_pr2.html 650 RAMAC announcement] The 305 RAMAC and the 650 RAMAC were internally announced on September 4, 1956.</ref><ref>[https://timesmachine.nytimes.com/timesmachine/1956/09/14/84711681.pdf I.B.M. To Put Out New 'Think' Units], ''New York Times'', September 14, 1956</ref> with test units already installed at the U.S. Navy and at private corporations.<ref name="RAMACAnn" /> RAMAC stood for "Random Access Method of Accounting and Control",<ref name=manual/> as its design was motivated by the need for real-time accounting in business.<ref name=film>[https://www.youtube.com/watch?v=zOD1umMX2s8 IBM RAMAC promotional film]</ref>