This is a black and white image of two men working next to a PDP-1 computer system. Both men are wearing suits. The man on the left of image is standing and holding paper tape from the computer. The man on the right of the image is sitting down and using a light pen on the computer screen. Written in black pen on the small label on verso side is "1/2 x 5/8" and on the larger label is "B.2.1 2" with the last 2 circled.