Yahoo! Inc. is an American multinational internet corporation headquartered in Sunnyvale, California, United States. The company is best known for its web portal, search engine (Yahoo! Search) and for a variety of other services, including Yahoo! Directory, Yahoo! Mail, Yahoo! News, Yahoo! Finance, Yahoo! Groups, Yahoo! Answers, advertising, online mapping, video sharing, fantasy sports and its social media website. It is one of the most popular sites in the United States. According to news sources, roughly 700 million people visit Yahoo! websites every month. Yahoo itself claims it attracts "more than half a billion consumers every month in more than 30 languages."
Yahoo! Inc. was founded by Jerry Yang and David Filo in January 1994 and was incorporated on March 1, 1995. On July 16, 2012, former Google executive, Marissa Mayer, was named as Yahoo CEO and President, effective July 17.
Yahoo! Mail is a free e-mail service offered by the American search engine company Yahoo! It was inaugurated in 1997, and, according to comScore, Yahoo! Mail was the second largest web-based email service with 310 million users as of October 2011, and the most popular webmail service in the United States.
Currently, Yahoo! offers three versions of Yahoo! Mail. The traditional "Yahoo! Mail Classic" continues the availability of the original interface introduced in 1997. A new version introduced in 2005 included a new Ajax interface, drag-and-drop, improved search functionality, keyboard shortcuts, address auto-complete, tabs, and more. In October 2010, Yahoo! released a new beta version of Yahoo! Mail, which included a new design, improved performance, improved search functionality, and improved Facebook integration. In May 2011, beta testing for the new version stopped, and it became the default interface for Yahoo! Mail.
In early 2008, Yahoo! started offering unlimited mail storage to its users, in response to heated competition in the free web-mail market segment.
On June 27, 2009, Yahoo! Messenger was integrated with Yahoo! Mail.