What does the CRO have to do with the TV?

The CRO has nothing to do with the TV. IN CRO there is a Cathode Ray Tube(CRT) which is common in both CRO and TV. Earlier TV's with black/white picture had these type of CRT tube for generating the picture on the screen for viewing. But now a days these has been replaced by TFT, LCD any many such new technologies.