“Blue Harvest” was the working title of Star wars before the name had been finalised.Another bit of trivia R2D2 comes from the label on a can of film Roll 2 day2.
@Johntomo: Actually R2D2 comes from how reels were labeled for editing to match recordings of voice with the film to sych it up. R2D2 actually means Reel 2 Dialog 2.
I saw it on a special where Lucas admits stuff like this in a kind of “making of” of the whole 6 movies