Official websites use .gov
A .gov website belongs to an official government organization in the United States.
Secure .gov websites use HTTPS
A lock ()
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Due to current HHS and NIH restructuring, the information provided on nidcd.nih.gov is not being updated currently. Please refer to nih.gov.
Assistive Devices: technical tools and devices such as alphabet boards, text telephones, or text-to-speech conversion software used to aid individuals who have communication disorders perform actions, tasks, and activities.