Abstract: A data transmission and display system including an input data source for transmitting data over a coaxial cable to be processed for use by a remotely-located CRT video display monitor and associated input/output devices and for receiving data over the coaxial cable initiated by the input/output devices. The data transmitted to the CRT video display monitor and to the input/output devices and the data received from the input/output devices takes the form of a plurality of successive data frames each comprising a plurality of successive data intervals. In the first interval of a frame, data is transmitted by the input data source over the coaxial cable in a forward direction to be used by one or more of the input/output devices for performing certain operations specified by the data. In the second interval of the frame, data which may be initiated by one of the input/output devices is transmitted over the coaxial cable in the reverse direction to the input data source for utilization thereby.