ITunes was a pioneer in digital media, and its share of the paid music download business stood at 64% in the second quarter.

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There were an estimated 150, 000 subscribers to paid music-download services at the end of 2001, according to IDC, with the number expected to rise to 10 million by 2005.

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Meanwhile, the growing willingness of music companies to sell song downloads without usage restrictions might eventually eat away at iTunes' dominance of the paid download market.

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