comScore, Inc. (Nasdaq: SCOR), released its monthly comScore qSearch analysis of the U.S. search marketplace for September 2007. Google remained the top search property with more than 5.3 billion core searches conducted, representing a 57% share of the search market, followed by Yahoo! 23.7%, Microsoft 10.3%, Ask.com 4.7% and Time Warner Network 4.3 %.

Search Entity                       Aug-07          Sep-07     Sep vs. AugTotal Core Search                   100.0%          100.0%        0.0Google Sites                         56.5%           57.0%        0.5Yahoo! Sites                         23.3%           23.7%        0.4Microsoft Sites                      11.3%           10.3%       -1.0Ask Network                           4.5%            4.7%        0.2Time Warner  Network                  4.5%            4.3%       -0.2

* 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.

September U.S. Expanded Search Rankings

In the September 2007 analysis of the Top 50 properties worldwide where search activity is observed, Google Sites led the pack with 6.6 billion searches. Yahoo! Sites ranked second with nearly 2.4 billion searches, followed by Microsoft Sites (999 million), Time Warner Network (843 million) and Fox Interactive Media (492 million). Despite the decline in overall search activity in September, Ask.com saw a 10-percent gain versus August.

Expanded Search Entity             Aug-07          Sep-07      Sep vs. AugTotal Expanded Search              13,703          13,018        -5.0%Google Sites                        6,809           6,593        -3.2%Google                              5,602           5,388        -3.8%YouTube/All Other                   1,207           1,205        -0.2%Yahoo! Sites                        2,473           2,381        -3.7%Yahoo!                              2,438           2,346        -3.8%All Other                              35              35         0.0%Microsoft Sites                     1,144             999       -12.7%MSN-Windows Live                    1,111             966       -13.1%Microsoft/All Other                    33              33         0.0%Time Warner Network                   937             843       -10.0%AOL                                   438             397        -9.4%Mapquest/All Other                    499             446       -10.6%Fox Interactive Media                 571             492       -13.8%MySpace                               560             483       -13.8%All Other                              11               9       -18.2%eBay                                  457             445        -2.6%Ask Network                           439             445         1.4%Ask.com                               205             226        10.2%MyWebSearch.com/ All Other            234             219        -6.4%CRAIGSLIST.ORG                        199             197        -1.0%Amazon Sites                          154             138       -10.4%Comcast Corporation                    73              65       -11.0%