Mattu said:
i think you'll find that is wrong the first GUI was on the alto as i said, released in April 1973. It had, a 3 button mouse, a bitmapped display, and graphical windows:
here is a picture of its interface, as you can see it's graphical in every sense of the word:
Apple just like to think they came up with it first (it makes them feel better about them selves after telling bill to shove it). The truth is that LISA was no way near the first, it wasnt even second, in fact it was actually 4th.
First was Xerox Alto
http://en.wikipedia.org/wiki/Xerox_Alto
then came Perq graphical workstation using POS (Perq Operating system) made by three waters (V for vendetta link there?) released in 79
http://en.wikipedia.org/wiki/PERQ
then came Xerox Star which was the follow up to the Alto in 81
http://en.wikipedia.org/wiki/Xerox_Star
ONLY then did Apple's Lisa get released in January 1983 (i know wiki say 1984 but its wrong)
http://en.wikipedia.org/wiki/Apple_Lisa
interestingly in that same year Microsoft annouced they would be releasing windows in 1984.
All of the above were Personal Computers
Now if we are going to get really technical the first ever gui was developed by Dr Engelbert as part of his work on early IA, he developed a system called NLS, which used a mouse and multiple windows to display information (hu didnt think wiki would have info on it but they do, here is a picture)
http://en.wikipedia.org/wiki/NLS_(computer_system)
but this was by no way a personal coumputer