Filed strictly under "fun" rather than a true contest, I was wondering if anyone can figure out the one (1) thing missing from this highly collectible Heathkit H8 computer system. The fact that the top cover is missing does not count, since I removed it so the inside of the system could be seen. In actuality, this unit is self-contained and ready to function as intended save for one key item. First correct answer to describe that key item gets a round of applause from all AA'rs and admiration from your fellow geeks everywhere!

You can view the images here. I highly recommend that after you click on an individual photo in the set that you go to "All Sizes" and pick "Original Size" to get the maximum detail.