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It is in embedded systems in automobiles, microwave ovens, electrocardiograph machines, compact disc players, and other devices. The bundled software used for uploading music, photos and videos to the iPod is called iTunes. Discontinued versions include two 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. 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. Most computer hardware is not seen by normal users. 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,