Accessibility as used by the Office of Civil Rights and the U.S. Department of Education regarding IT is as follows:
"Accessible" means a person with a disability is afforded the opportunity to acquire the same information, engage in the same interactions, and enjoy the same services as a person without a disability in an equally effective and equally integrated manner, with substantially equivalent ease of use. The person with a disability must be able to obtain the information as fully, equally, and independently as a person without a disability"
Burgstahler, S. (January 30, 2017). ADA compliance for online course design. EDUCAUSE Review