Kim Mast developed an email system in 1974 on a computer system called PLATO at the University of Illinois with thousands of users using 512x512 graphics comput

Kim Mast developed an email system in 1974 on a computer system called PLATO at the University of Illinois with thousands of users using 512x512 graphics computer terminals which were located throughout the country and had output speeds of 180 characters/sec. http://www.thinkofit.com/plato/dwplato.htm http://www.thinkofit.com/plato/dwplato.htm Also a year prior to that a forum system was developed by David Woolley There is a current version still working on this system: https://cyber1.org https://cyber1.org