The 2741 was a Selectric typewriter set up as a remote terminal. It ran at about 14 characters per second. It printed on fan-folded pin-fed paper — there would have been a box of it behind the terminal in the photo. It was commonly used to access the time sharing systems of the day, such as CP/67, TSS, TSO, or Multics. It was popular with users of the interactive APL programming language. APL used a lot of special characters, which could be supported by simply changing the type ball.