comScore Releases February 2009 U.S. Search Engine Rankings

Ad Operations OnlineRESTON, VA, March 13, 2009 – comScore, Inc. (NASDAQ: SCOR), a leader in measuring the digital world, today released its monthly comScore qSearch analysis of the U.S. search marketplace. Americans conducted 13.1 billion core searches in February 2009, down 3 percent versus January – a decline that is primarily the result of the shortened month.

February 2009 U.S. Core Search Rankings

Google Sites led the U.S. core search market in February with 63.3 percent of the searches conducted, followed by Yahoo! Sites (20.6 percent), Microsoft Sites (8.2 percent), Ask Network (4.1 percent) and AOL LLC (3.9 percent).

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comScore Core Search Report*

February 2009 vs. January 2009

Total U.S. – Home/Work/University Locations

Source: comScore qSearch 2.0

Share of Searches (%)

Core Search Entity      Jan-09         Feb-09       Point Change Feb-09 vs. Jan-09

Total Core Search       100.0          100.0                    N/A

Google Sites             63.0          63.3                     0.3

Yahoo! Sites             21.0          20.6                    -0.4

Microsoft Sites           8.5           8.2                    -0.3

Ask Network               3.7           4.1                     0.4

AOL LLC                   3.9           3.9                     0.0

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* Based on the five major search engines including partner searches and cross-channel searches. Searches for mapping, local directory, and user-generated video sites that are not on the core domain of the five search engines are not included in the core search numbers.

Americans conducted 13.1 billion searches at the core search engines, down 3 percent from January. Google Sites handled 8.3 billion core searches, followed by Yahoo! Sites with 2.7 billion and Microsoft Sites with 1.1 billion.

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comScore Core Search Report*

February 2009 vs. January 2009

Total U.S. – Home/Work/University Locations

Source: comScore qSearch 2.0

Search Queries (MM)

Jan-09        Feb-09      Percent Change Feb-09 vs. Jan-09

Total Core Search    13,496        13,104                -3%

Google Sites          8,497         8,293                -2%

Yahoo! Sites         2,836          2,696                -5%

Microsoft Sites      1,146          1,073                -6%

Ask Network            497            536                 8%

AOL LLC                520            507                -3%

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* Based on the five major search engines including partner searches and cross-channel searches. Searches for mapping, local directory, and user-generated video sites that are not on the core domain of the five search engines are not included in the core search numbers.

February 2009 U.S. Expanded Search Rankings

In the comScore February 2009 analysis of the top properties where search activity is observed, Google Sites led with 11.3 billion searches, down 4 percent versus January. Yahoo! Sites ranked second with 2.8 billion searches, followed by Microsoft Sites (1.1 billion) and AOL LLC (761 million).

View chart with U.S. Expanded Search Rankings at: http://www.comscore.com/press/release.asp?press=2750

About comScore

comScore, Inc. (NASDAQ: SCOR) is a global leader in measuring the digital world and preferred source of digital marketing intelligence. For more information, please visit www.comscore.com/companyinfo