You might be thinking of Zephyr, which was part of Project Athena. My school was using Athena, and I occasionally received zephyrgrams from people at MIT. http

You might be thinking of Zephyr, which was part of Project Athena. My school was using Athena, and I occasionally received zephyrgrams from people at MIT. http://web.mit.edu/sipb/doc/working/izephyr/html/izephyr.html http://web.mit.edu/sipb/doc/working/izephyr/html/izephyr.htm... https://en.wikipedia.org/wiki/Zephyr_(protocol) https://en.wikipedia.org/wiki/Zephyr_(protocol)