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Assistive technology
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==Augmentative and alternative communication== {{Main|Augmentative and alternative communication}} [[File:AAC user using eye gaze.JPG|thumb|An AAC user uses number coding on an eye gaze communication board.]] Augmentative and alternative communication (AAC) is an umbrella term that encompasses methods of communication for those with impairments or restrictions on the production or comprehension of spoken or written language.{{sfnp|ASHA|2005}} AAC systems are extremely diverse and depend on the capabilities of the user. They may be as basic as pictures on a board that are used to request food, drink, or other care; or they can be advanced [[speech generating device]]s, based on speech synthesis, that are capable of storing hundreds of phrases and words.{{sfnp|Gilliam|Marquardt||pp=356β359}}
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