The 1954 Rand That Wasn't
That 1954 mock-up of a “home computer“ is actually a very, very good Photoshop creation:
Though it has been significantly doctored, what you actually see in the image above is a full-scale mock-up of the maneuvering room of a nuclear submarine.
The original photograph, taken at a Smithsonian Institution exhibit called "Fast Attacks and Boomers: Submarines of the Cold War," became the basis of a Fark.com Photoshop contest in September 2004, for which the above image, including caption, was created.
source: http://urbanlegends.about.com/library/bl_rand_home_computer.htm
You can see the contest and other entries here: http://forums.fark.com/cgi/fark/comments.pl?IDLink=1115586&mode=voteresults
Additional story here: http://www.snopes.com/inboxer/hoaxes/computer.asp