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Of course, back in the 1980s all UK domain names were the other way round. UCL was uk.ac.ucl.cs if you used X25 and cs.ucl.ac.uk if you used TCP/IP. UCL was the gateway between the two worlds, and used magic heuristics to figure out which universe to forward email to. For example, if the domain started with "cs" it was a TCP/IP address and if it ended with "cs" it was an X25 address. Which worked well, right up until Czechoslovakia joined the Internet.



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