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In 1968 the British government merged the last of the country's computer makers into a single company and told it to beat IBM. International Computers Limited had 34,000 employees, factories in Manchester and Stevenage, a protected home market, and a state shareholding. On the day it was founded it also owned a mainframe that could run IBM software, which is the detail that makes everything that came after so hard to forgive.
This is the full story of ICL: the shotgun merger that created it, the New Range decision that orphaned its own customers, the 2900 series and the VME operating system that engineers still defend forty years on, the collapse of 1981 that came within weeks of ending the company, the Fujitsu agreement that saved it and cost it its independence, the sale to STC, the passage into Japanese ownership, and the Horizon contract that attached the ICL name to one of the worst miscarriages of justice in British legal history.
It is a story about a company that could build better machines than its competitors and still lost, because in computing the machine was never the asset. The software was.
Sources and further reading:
https://www.gracesguide.co.uk/International_Computers_Ltd
https://www.postofficehorizoninquiry.org.uk/
https://hansard.parliament.uk/
https://www.fujitsu.com/uk/about/local/corporate/history/
https://www.theregister.com/
Martin Campbell-Kelly, ICL: A Business and Technical History, Oxford University Press, 1989
John Hendry, Innovating for Failure: Government Policy and the Early British Computer Industry, MIT Press
Centre for Computing History, Cambridge, ICL collections and machine records
The National Archives, Department of Industry files on ICL and the 1981 loan guarantee
Financial Times and Times business archives, coverage of the ICL rescue 1981 and the STC acquisition 1984
You can contact me at: thefallenboardroom@proton.me
This channel is made by an enthusiast who loves business and technology history — nothing more. All videos are for educational and entertainment purposes only and reflect my personal views and interpretations. I research each story carefully using publicly available sources, but errors or omissions can happen. Nothing here is professional, financial, or legal advice, and this channel is not affiliated with, endorsed by, or sponsored by any company mentioned.
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