Tyler Technologies, Inc., based in Plano, Texas, is the largest provider of software to the United States public sector. Tyler Technologies has offices in 17 states and one in Toronto, Ontario, Canada. Tyler Technologies was founded by Joseph F. McKinney in 1966 as Saturn Industries after buying three government companies from Ling-Temco-Vought. In 1968, the company acquired Tyler Pipe, a manufacturer of iron pipes, which eventually became the company's main source of annual revenue. Tyler Pipe was later renamed Tyler Corporation as a result of its success. In 1969, Saturn Industries was listed on the New York Stock Exchange. In 1970, the company changed its name to Tyler Corporation. Tyler Corporation entered the government software market in 1998. Tyler Corporation changed its name to Tyler Technologies in 1999.