Closed down services.

Main article: List of Yahoo!-owned sites and services#Closed/defunct services

Geocities was a popular web hosting service founded in 1994. At one point it was the 3rd most-browsed site on the World Wide Web.Yahoo! purchased Geocities in 1999. Ten years later Yahoo! closed Geocities, deleting millions of web pages in the process. A great deal of information was certainly lost but many of those sites & pages have been mirrored at the Internet Archive"OOcities.com", and more.
Yahoo! 360° was a popular blogging/social networking beta service launched in March 2005 by Yahoo! and closed on July 13, 2009.
Yahoo! Mash beta was another social service closed after one year of operation prior to leaving beta status
Yahoo! Photos was shut down on September 20, 2007, in favor of integration with Flickr.
Yahoo! Tech was a web site that provided product information and setup advice to users. Yahoo! launched the web site in May 2006. On March 11, 2010, Yahoo! closed down the service and redirected users to Yahoo!'s technology news section.
Other discontinued services include Farechase, My Web, Audio Search, Pets, Live, Kickstart, Briefcase, and Yahoo! for Teachers.