History of Yahoo!
On March 8, 1997, Yahoo! acquired online communications company Four11. Four11's webmail service, Rocketmail, became Yahoo! Mail. Yahoo! also acquired ClassicGames.com and turned it into Yahoo! Games. Yahoo! then acquired direct marketing company Yoyodyne Entertainment, Inc. on October 12, 1998. In January 1999, Yahoo! acquired web hosting provider GeoCities. Another company Yahoo! took over was eGroups, which became Yahoo! Groups in June 2000. On March 8, 1998, Yahoo! launched Yahoo! Pager, an instant messaging service that was renamed Yahoo! Messenger a year later.
History of Yahoo!
On August 27, 2007, Yahoo! released a new version of Yahoo! Mail. It added Yahoo! Messenger integration (which included Windows Live Messenger due to the networks' federation) and free text messages (not necessarily free to the receiver) to mobile phones in the U.S., Canada, India, and the Philippines.