Network 10 (commonly known as Channel 10 or simply 10), is an Australian commercial broadcasting network owned by Ten Network Holdings, and is headquartered in Pyrmont, New South Wales. It is the third Australian free-to-air television network to make its debut after Nine Network in 1956 and Seven Network in 1956. It first aired on August 1, 1964 in Melbourne. Network Ten is the fourth of all the five national free-to-air networks in Australia, after the ABC. Its affiliate owned-and-operated stations can be found in the capital cities of Sydney, Melbourne, Brisbane, Adelaide and Perth, while affiliates extend the network to cover most of the country. The channel's name became a backronym for "The Entertainment Network" during the early-1990s.