The word "yahoo" is a backronym for " Yet Another Hierarchically Organized Oracle" or "Yet Another Hierarchical Officious Oracle". The "" domain was registered on January 18, 1995. In March 1994, "Jerry and David's Guide to the World Wide Web" was renamed "Yahoo!" and became known as the Yahoo Directory. The site was a human-edited web directory, organized in a hierarchy, as opposed to a searchable index of pages. In January 1994, Yang and Filo were electrical engineering graduate students at Stanford University, when they created a website named "Jerry and David's guide to the World Wide Web". The Yahoo home page in 1994, when it was a directory. However, Yahoo domain websites are still among the most popular websites, ranking 12th in global engagement according to both Alexa Internet and SimilarWeb. Usage declined in the late 2000s as it lost market share to Google. In 2000, it was the most popular website worldwide. Yahoo was established by Jerry Yang and David Filo in January 1994 and was one of the pioneers of the early Internet era in the 1990s. It provides a web portal, search engine Yahoo Search, and related services, including My Yahoo!, Yahoo Mail, Yahoo News, Yahoo Finance, Yahoo Sports and its advertising platform, Yahoo! Native. It is headquartered in Sunnyvale, California and operated by the namesake company Yahoo! Inc., which is 90% owned by investment funds managed by Apollo Global Management and 10% by Verizon Communications. Yahoo ( / ˈ j ɑː h uː/, styled as yahoo !) is an American web services provider.