IBM 7094 running IBSYS operating system. In those days a PC meant punch card. I used an IBM 026 card punch to enter my Fortran IV program one line per card foll

IBM 7094 running IBSYS operating system. In those days a PC meant punch card. I used an IBM 026 card punch to enter my Fortran IV program one line per card followed by the data cards. With a rubber band around it, I placed my card deck into a cardboard box for the next batch run. They were read onto reel-to-reel tape by an IBM 1400 series system and the tape transferred to the 7094. The 1400 series system printed out the results of compilation and execution from the output tape of the 7094. This was mid-year 1967.