O! was active in Perth from during most of the 90s, and were one of  Chapter Music's early flagship bands. They released two albums on Chapter in 1994, the cassette-only Scared Of Scary, and the label's first CD release, Sporco. Members went on to play in bands such as Adam Said Galore, Mukaisake, Tucker B's, Harry Smith, Umpire, 10 Bit Tonsil and Catherine Traicos and the Starry Night. They reformed in 2013 for RTR FM's 20th anniversary edition of In The Pines festival.