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.

Stand-alone electronic communication systems intended to facilitate a limited or private dialogue between two or more persons in different locations. Included are, e.g. door entry systems with integrated door openers, entry phone amplifiers. Assistive products for signalling, alarming, monitoring, and identifying, see 22 29 Closed-circuit television systems, see 22 18 18