DynaVox Systems makes communication available to all. DynaVox provides communication devices used by persons with speech, learning, and physical disabilities. It also develops text-to-speech software. Its products, which come in various keyboard- and touch screen-based form factors, are used by children and adults disabled by ALS, autism, cerebral palsy, mental retardation, Parkinson's Disease, stroke, and traumatic brain injury. In addition to hardware and software, the company provides technical and reimbursement support services. DynaVox's Mayer-Johnson division develops symbol-based desktop publishing software.