NRAO’s Early Computers
Computer operators Sandy Braun (standing) and IBM employee Mary Jennings in the Charlottesville computer room in 1967. Every day, staff drove here with tapes of telescope data from Green Bank. Handwritten processing programs were transferred to cards using a keypunch. Sandy is feeding the punch cards into the computer. It would return hundreds of pages of data that were checked by eye then sent back to Green Bank. Mary is at the main terminal with a teletype keyboard with printer output — no video terminals in 1967! The computer is an IBM 360 series, and the operating system was known as OS/360; programs were probably written in PL/1 or Fortran.