As of July 2006, the lineup consists of the 5th generation iPod, with a video player; the iPod nano, with a color screen; and the iPod shuffle. 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. Discontinued versions include two generations of the iPod mini and four generations of the iPod mini and four generations of the iPod mini and four generations of the iPod mini and four generations of the iPod mini and four generations of the iPod mini and four generations of the full-sized iPod, all of which had monochrome screens (except for the iPod shuffle) and provide a simple user interface. The full-sized model stores media on a built-in hard drive, while the smaller iPod nano and iPod shuffle use flash memory. The iPod is a brand of portable media players designed and marketed by Apple Computer. Like many digital audio players, iPods can serve as external data storage devices when connected to a computer. Computer hardware is the physical part of a computer, including the digital circuitry, as distinguished from the computer software that executes within the hardware. The iPod is a brand of portable media players designed and marketed by Apple Computer. Like many digital audio players, iPods can serve as external data storage devices when connected to a computer. Computer hardware is the physical part of a computer, including the digital circuitry, as distinguished from the computer software that executes within the hardware. The iPod is currently the world's best-selling digital audio player, and its worldwide mainstream adoption makes.