So Glad It Was Tethered

Robot goes on ultimate Riverdance .  I want to know what program that was.  Back at the beginning of time, it was said that commands to TECO, an early text editor on PDP-11 minicomputers was indistinguishable from line noise.  (An artifact of acoustic couple modems.  You would not understand.   If I ried to explain it, disco  might return.)

I wonder if this was the equivalent.