I remember all three, my father used to leave me at the console when he would take me to work on the weekends at IBM. Not sure that was system 3 or not. Betwee

I remember all three, my father used to leave me at the console when he would take me to work on the weekends at IBM. Not sure that was system 3 or not. Between that and reams of green bar to use at home for "artwork" I found my fascination with computers. Didn't hurt we had first generation IBM PCs and before then my father had about everything heath kit put out.