[[Teletext]] offers one-directional data transmission, broadcast via an television signal (it is a ViewData like system). (Generally Commonly it is transmitted found in an analogue television signalsignals and contains data for text and crude graphics. Digital television uses televisions have text services which use a different systemmethod (almost HTML based).More commonly it contains pages of text (including news) and crude graphicsTeletext is also "Mode 7" on the BBC Micro.
== Required UHF/VHF Decoder (Tuner) ==