MMOs in their original form, MUDs were really the for-fathers of digital RPGs, and the best beginnings of multiplayer action.
Nice forum post on Gamespy, with links to other articles: http://forums.gamespy.com/gaming_discussion/b50597/19931970/p1/?12/ (http://forums.gamespy.com/gaming_discussion/b50597/19931970/p1/?12/)
I remember playing my first one in 1990.... and I think DD might have actually created one in his life time if memory serves!
What about your fond memories? Have any on MUDs?
I used to MUD back in '99/2000 the thing that I both loved and hated was the politics.
I look back at the time I spent and wonder if it was worth the few good memories...