Two-way applications for cable television systems in the '70s

Two-way communications on a cable television system can be achieved in many different ways. This special report surveys the various approaches that have been proposed and are being tried experimentally in the field. The emphasis is on the basic engineering configurations rather than on the uses to which the systems can be put. For almost all of the systems, the possible two-way uses are limited only by one's imagination. The capability for any communications task exists if one is willing to pay the price.