Yahoo

Yahoo operates a portal that provides the latest news, entertainment, and sports information. The portal also gives users access to other Yahoo services like Yahoo Mail, Yahoo Maps, Yahoo Finance, Yahoo Groups and Yahoo Messenger. S This section's factual accuracy may be compromised due to out-of-date information. Please update this article to reflect recent events or newly available information. (June 2012) Working with comScore, The New York Times found that Yahoo was able to collect far more data about users than its competitors from its Web sites and advertising network. By one measure, on average Yahoo had the potential in December 2007 to build a profile of 2,500 records per month about each of its visitors.[32] Yahoo retains search requests for a period of 13 months. However, in response to European regulators, Yahoo obfuscates the IP address of users after three months by deleting its last eight bits.[33] On March 29, 2012, Yahoo announced that it would introduce a "Do Not Track" feature that summer, allowing users to opt out of Web-visit tracking and customized advertisements.[34] However, on April 30, 2014, Yahoo announced that it would no longer support the "Do Not Track" browser setting.[35] According to a 2008 article in Computerworld, Yahoo has a 2-petabyte, specially built data warehouse that it uses to analyze the behavior of its half-billion Web visitors per month, processing 24 billion daily events.[36] In contrast, the United States Internal Revenue Service (IRS) database of all United States taxpayers weighs in at only 150 terabytes.[36]

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