Summary Box: Google music store challenges Apple

GOOGLE MUSIC: Google launched its online music store with 13 million tracks to U.S. customers in a challenge to Apple’s iTunes. It has partnerships with three of the four major recording companies: Universal, Sony and EMI. Warner was left out.

FREE CLOUD: Google Is offering free online storage of 20,000 songs, which can be streamed or downloaded with different devices, including Apple Inc. devices like the iPhone using the Safari browser.

ITUNES PRICES: Google is selling music for prices that match those at iTunes ? 69 cents, 99 cents and $1.29. The company also is giving away dozens of songs for free and says it will continue to offer new free tracks.