Growth

While the company's primary market is in the web content arena, Google has begun to experiment with other markets, such as radio and print publications. On January 17, 2006, Google announced that it had purchased the radio advertising company dMarc, which provides an automated system that allows companies to advertise on the radio.[28] This will allow Google to combine two niche advertising media—the Internet and radio—with Google's ability to laser-focus on the tastes of consumers. Google has also begun an experiment in selling advertisements from its advertisers in offline newspapers and magazines, with select advertisements in the Chicago Sun-Times.[29] They have been filling unsold space in the newspaper that would have normally been used for in-house advertisements.Google was added to the S&P 500 index on March 30, 2006. Google replaced Burlington Resources, a major oil producer based in Houston which was acquired by ConocoPhillips.