Teletext now known as Ceefax ("see facts", the departmental stationery used the "Cx" logo), on various news shows. The Independent Television Authority (ITA) announced their own service in 1973, known as ORACLE (Optional Reception of Announcements by Coded Line Electronics). Not to be outdone, the GPO immediately announced a 1200/75 baud videotext service under the name Prestel. The first teletext test transmissions were made by Ceefax in 1973. After proliferation of the BBC system in the UK, it was adopted in Europe and standardised as World System Teletext (WST). The World Wide Web began to take over some of the functions
Teletext to four lines a frame. While the basic teletext format has remained unchanged in more than 30 years, a number of improvements and additions have been made. A closely related service is the Video Program System (VPS), introduced in Germany in 1985. Like teletext, this signal is also broadcast in the vertical blanking interval. It consists only of 32 bits of data, primarily the date and time for which the broadcast of the currently running TV programme was originally scheduled. Video recorders can use this information (instead of a simple timer) in order to automatically record a scheduled programme, even