The usability of a product, service, environment or facility by people with the widest range of capabilities
Note 1 to entry: This definition is related to the fundamental principle of universal accessibility in the United Nations
Convention on the Rights of Persons with Disabilities[13], which outlines the requirements to be fulfilled by environments, processes, goods, products and services, objects, instruments, tools and devices in order to be understandable, usable and viable for a" people in safe and comfortable conditions, and as independently and naturally as possible