telecommunications systems and networks and which allows the provision of final services, distribution services and value added services; “value added services” means such services as may be available over a telecommunications system in addition to voice telephony service, and specifically those services listed as "value added services" in these Regulations, including the following(a) “videotex” means a service involving a twoway interactive computer-based information system in which a subscriber is linked to a database by telephone line or cable; (b) “teletex” means a service whereby a subscriber can exchange office correspondence in the form of documents containing teletex coded information on an automatic memory-tomemory basis; (c) “teleaction” means a service used to send short messages at very low transmission speeds between the subscriber and a communications network; (d) “telecommand’” means a service whereby a supervised system is controlled from a remote control device; (e) “telealarm” means a service whereby an electric signal is sent to a remote control device each time there is a threshold change of conditions in the supervised system; (f) "store and forward messaging service" means a service whereby messages can be exchanged between subscribers using storage and retransmission devices; (g) "teleprocessing and data processing” means an interactive service used for the processing of data and exchange of messages between the 12