One of the ways to get some early computers up and running in the '60s and early '70s was to read in a program punched on paper tape. The tape was laid out in "tracks": rows of punched holes for 1s and blank paper tape for 0s. The tapes would be read in either using a dedicated tape reader, or sometimes by a teletype with attached reader/punch such as the ASR-33. These particular tapes were punched at VCF East 4.0 in 2007, by the pictured ASR-33 attached to David Gesswein's PDP-8/M.