Confusion around the terms commissioner, buyer, service user, customer (as used in the TEC sector) can arise because (eg) a local authority is a buyer in some transactions, a commissioner in others, and a provider in still others. Need to establish a terminology that clearly identifies roles within the TEC sector: - Commissioner of services (eg LA) - Buyer of services (eg a residential home) - Equipment supplier - Telecomms provider - Service provider - assessment - Service provider - installation and maintenance - Service provider - monitoring - Service provider - response