Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. RTÉ Aertel is a teletext service broadcast on RTÉ One and RTÉ Two in the Republic of Ireland, and also available in its entirety on the Internet. The service began development in the mid-1980s (with tests as early as 1985) and was formally launched on 22 June 1987. Originally called simply Aertel, it gained the RTÉ prefix along with RTÉ''s other activities from September 2003. The rte.ie news service used to simply wrap Aertel''s output in to their web pages, and the service is also available on WAP. A selection of RTÉ Aertel pages are broadcast in-vision on rotation overnight on RTÉ Two after normal programming, under the title Nightscreen.