1. iMedia Spring 2002 Summit Using Online Buying to Plan Media

2. comScore Mission To improve the efficiency and effectiveness of clients’ advertising, sales and marketing efforts — both online and offline

3. About comScore Networks One of the largest online databases in the world with more than 1.5 million global opt-in participants A representative cross section of the global Internet universe Accurate measurement of the key consumer segments, (e.g. at Home, at Work, at Universities, International/Worldwide) Unique passive server side data collection methodology

4. comScore Estimate = (Total Non-Travel – Event Tickets + Estimated Auction Fees) comScore vs. US Dept of Commerce Consumer e-Commerce Sales in $Billions

5. e-Commerce Growing in Importance Consumer e-Commerce Sales as % of Total Retail 0.7% 0.8% 0.9% 1.1% 1.0% 0.9% 1.0% 1.2% 4Q991Q002Q003Q004Q001Q012Q013Q014Q01 (excluding Travel and Event Tickets) Source: U.S. Department of Commerce

6. netScore Projection of Worldwide Internet Usage Machines (March 2002) USUniv 3% US Work 19% US Home 20% Int'l 58% The Big Picture Total WW Internet Usage has Grown to 320MM Machines 122.6 46.9 9.6 US Univ US Work US Home US Online Population (Millions)

7. How are They Accessing the Internet? *US Only 20012002

8. % of Daily Online Sales by Hour US Home + Work + School Excluding Travel and Auction Sales - August 2001 4% 5% 6% 7% 8% 9% 6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm

9. Dollars Spent $45 $85 $5 $0 $10 $20 $30 $40 $50 $60 $70 $80 $90 Home Work International Home Work International Impact of Machine Location Machine Location Is Critical Visitor Buying Power

10. % of US Daily Online Sales By Hour and PC Location Excluding Travel and Auction Sales - Aug 2001 0% 2% 4% 6% 8% 10% 6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm Work Home School

12. Case Study Evaluating Orbitz’ Media Plan

14. Orbitz’ Q4 Spending Focused on High Traffic Sites AllocatingOrbitz’Ad $ Q4 2002 Ad Spending Top Sites 41% 15% 8% 6% 5% LYCOS EXCITE ALTAVISTA AT&T WORLDNET WEATHER.COM Source: 4th Quarter 2001 CMR

15. Many Smaller Sites Have a Higher Travel BPI AllocatingOrbitz’Ad $ 131 130 143 193 207 291 307 312 337 371 LYCOS EXCITE ALTAVISTA AT&T WORLDNET WEATHER.COM mapsonus.com sonypictures.com superpages.com foodtv.com ezsweeps.com Source: netScore April 2002

16. Other Sites May be More Cost Effective Due to Their Higher Travel BPI AllocatingOrbitz’Ad $ *=(Impressions)(BPI/100) **=Actual/Weighted Impressions

17. Work traffic is 26% of online traffic in the US Work purchasing is a critical component of online sales Travel is a top category purchased online with more than 7$Billion in Q1 online sales Using information about where buyers of specific categories can be found, can make media planning and buying more efficient In Summary