1 Also known as barrier-free design and related to universal design and inclusive design.

2 The four characteristics of accessible designs are derived from W3C Web Content Accessibility Guidelines 1. 0, 1999; ADA Accessibility Guidelines for Buildings and Facilities, 1998; and Accessible Environments: Toward Universal Design by Ronald L. Mace, Graeme J. Hardie, and Jaine P. Place, The Center for Universal Design, North Carolina State University, 1996.

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