I really wonder how the CDC link worked.  The channels were electrically strange, and certainly not easily amenable to communicating with anything other than CDC controllers or perhaps a serial line through one of the front ends.

I did hear of a proposal at NADC around 1977 to try to hook into telnet and ftp from a CDC using some hack of the serial stuff.  The idea didn’t impress me: it would have taken a lot of hacking to get a kludge working.  It always took a lot to make CDC hardware play well with others.

> On 5Dec 2017, at 3:24 AM, Paul Ruizendaal <pnr at planet.nl> wrote:
> 
> - In 1974, the Lab’s CDC 6600 became the first online supercomputer when it was connected to ARPANET, the Internet’s predecessor.

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