Access Main Computer File is a marvelous celebration in images of (mostly phony) computer user interfaces from Hollywood. Once there, mouse over the pictures to see the movie name and year. Notably absent is the instant messaging screen from Pretty In Pink's library scene. Above, Weird Science (1985) and Tron (1982). (Thanks, Jess Hemerly!)
And in a similar vein, there's the classic "Let's enhance" montage of faux image enhancement scenes in movies.