yertzl

hey all, im a newb at this emulator stuff. anyway i was looking in the opshop the other day, and i found the game ultima I, II, and III. i use to play UO a few years back(about 9yrs now). so now i really want to see the orig is like. so how does this emulator stuff work. i get i need it 2 play the game but which one, and where can i find the game? if anyone can make my search easier much appreshiated.