Hi, In my research for a book about the history of the PLATO system I've learned that there was an RFC document, RFC600 written in 1973, that proposed a way to connect a PLATO terminal to the ARPAnet. Alas --- just my luck --- RFC600 appears to be the only RFC document of *all* RFCs that are not available for free on the net in one of the many web archives. Nor have I found a university that has a copy. I've been in touch with Art Berggreen, the author of the RFC, and I'm hoping he successfully finds a copy somewhere in his papers. In the meantime, I thought I would ask the members of AIR-L if any of you have a copy. If you do, or you know where I could obtain a copy, could you let me know? Thanks, - Brian Brian Dear / brian@birdrock.com La Jolla, CA