RTI International is a nonprofit organization headquartered in the Research Triangle Park in North Carolina. RTI provides research and technical services. It was founded in 1958 with $500,000 in funding from local businesses and the three North Carolina universities that form the Research Triangle. RTI research has covered topics like HIV/AIDS, healthcare, education curriculum and the environment, among others. The US Agency for International Development accounts for about 35 percent of RTI's research revenue.