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Like many digital audio players, iPods can serve as external data storage devices when connected to a computer. The most recent version of iTunes has video organization features. As a music jukebox application, iTunes stores a comprehensive library of the user's music on their computer and can play, burn, and rip music from a CD. The iPod is currently the world's best-selling digital audio player, and its worldwide mainstream adoption makes it one of the most popular consumer brands. The hardware of a computer is infrequently changed, in comparison with software and data, which are "soft" in the sense that they are readily created, modified or erased on the computer. Personal computers, the computer hardware familiar to most people, form only a small minority of computers (about 0.2% of all new computers produced in 2003) Market statistics. Most computer hardware is not seen by normal users. Computer hardware is the physical part of a computer, including the digital circuitry, as distinguished from the computer software