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.
Hightail
Throughout 2008, YouSendIt added plugins that allowed files to be sent through YouSendIt from within applications like Final Cut Pro, Microsoft Outlook, and Adobe Acrobat. In May of that year, a new release of Yahoo! Mail included YouSendIt built-in, which added a million YouSendIt users over the following two months. In July, YouSendIt's online folder management system and digital signing features were introduced in order to compete with Dropbox. The following month, YouSendIt added applications for Mac and PC desktops, as well as iOS and Android devices.