Sabre is an aerospace information company headquartered in Dallas best known for its airline and hotel reservation system. The Sabre reservation system is behind virtually every airline ticket sold online or through a travel agent. Sabre also owns travelocity.com, one of the best-known travel sites on the web. As an offshoot of its worldwide reservation system, which dates back to the 1970s, Sabre has become one of the leading data centers, hosting web servers and other high-uptime networked systems around the world. They've also got a range of information and software products aimed primarily at the aerospace industry.