Products intended to support, train or replace a person's capacity to receive, send, produce and process information in different forms, including communicating by language, signs and symbols, receiving and producing messages, carrying on conversations and using communication devices and techniques. Included are, e.g. devices for seeing, hearing, reading, writing, telephoning, signalling and alarming, information technology. Assistive products for office administration, information storage and management at work, see 28 21.

Included are, e.g. magnifying devices.

Devices for absorbing light with defined wavelengths and filtering out those that are unwanted.