Communication Aids for Disabled

TDD; TTY Telephone; Text Telecommunication; Text Telecommunication Devices; Text Telephone; Communication Board; Speech Synthesizer; Synthesizer, Speech; Synthesizers, Speech; TTY Telephones; Telecommunication Device, Text
Equipment that provides mentally or physically disabled persons with a means of communication. The aids include display boards, typewriters, cathode ray tubes, computers, and speech synthesizers. The output of such aids includes written words, artificial speech, language signs, Morse code, and pictures.