The St.George Co-operative Building Society was in south Sydney in 1937. The society grew over the years and rapidly expanded during the post-war housing boom in the 1950s. In 1955, the Society became a Permanent Building Society, aiming to provide funds for members to buy houses. In 1970, the society adopted the familiar dragon logo. In 1972, St.George became the first Australian building society to go online when it installed an IBM computer network. It was awarded full banking status in 1992 and in the same year acquired BankSA. In 2008, St.George Bank shareholders approved a merger with Westpac Banking Corporation.