Teletext and Viewdata and their relevance to communication disorders.
D000328:Adult; D002648:Child; D003626:Data Display; D003638:Deafness / Q000534:rehabilitation*; D006233:Persons with Disabilities; D006801:Humans; D007256:Information Systems; D011932:Reading; D013064:Speech Disorders / Q000534:rehabilitation*; D013685:Telecommunications / Q000295:instrumentation*; D013689:Telephone; D013690:Television