This International Standard establishes a classification of technical aids for persons with disabilities. It is restricted to technical aids intended mainly for the use of an individual. Technical aids used by a person with a disability, and which require the assistance of a helper for their operation, are included in the classification. The following items are specifically excluded from this International Standard: - items used for the installation of technical aids; - solutions obtained by combinations of technical aids which are individually classified in this International Standard; - medicines; - technical aids and instruments used exclusively by healthcare professionals; - non-technical solutions, such as personal assistance, guide-dogs or lip-reading; - implanted devices; - financial support.