There used to be discussion forums by post too. Pages 70 & 71 of "Signal: communication tools for the information age" (A Whole Earth Catalog) have details. I

There used to be discussion forums by post too. Pages 70 & 71 of "Signal: communication tools for the information age" (A Whole Earth Catalog) have details. I'll take a photo and put it up on Imgur, because the official site is broken. Here's a link, sorry for the poor photography: https://imgur.com/a/4miM4vP https://imgur.com/a/4miM4vP