RFC 89 from January 1971 is interesting: > While awaiting the completion of an interim network control program > (INCP) for the MIT MAC Dynamic Modeling/Computer Graphics PDP-6/10 > System (MITDG), we were able to achieve a number of 'historic moments > in networking' worthy of some comment.
> Our experiments were run on the MITDG PDP-6/10 using what we have > affectionately called our 'interim interim NCP' (IINCP). > MITDG runs the MAC Incompatible Time-sharing System (ITS) > At MITDG are a PDP-6/10 Time-sharing System https://tools.ietf.org/rfc/rfc89.txt
