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The accessibility of an information system aims to ensure that it can be used by all types of users. Usability covers a set of concepts relating to its execution time, performance, ease of learning, and user satisfaction. The concept of user experience goes a step further, considering that it is based on “an emotional state”.The ISO 9241–11 standard, relating to the ergonomics of human-system interactions defines the usability of a system as “the extent to which a product (or service or an envir...