ISO 9999:2016 establishes a classification and terminology of assistive products, especially produced or generally available, for persons with disability.

Assistive products used by a person with disability, but which require the assistance of another person for their operation, are included in the classification.

The following items are specifically excluded from this International Standard:

- items used for the installation of assistive products;

- solutions obtained by combinations of assistive products that are individually classified in this International Standard;

- medicines;

- assistive products and instruments used exclusively by healthcare professionals;

- non-technical solutions, such as personal assistance, guide dogs or lip-reading;
- implanted devices;

- financial support.