The full-sized model stores media on a built-in hard drive, while the smaller iPod nano and iPod shuffle use flash memory. 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. Firmware is a special type of software that rarely, if ever, needs to be changed and so is stored on hardware devices such as read-only memory (ROM) where it is not readily changed (and is therefore "firm" rather than just "soft"). The most recent version of iTunes has video organization features. All three models were released in 2005. 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. It is in embedded systems in automobiles, microwave ovens, electrocardiograph machines, compact disc players, and other devices. Devices in the iPod family are designed around a central scroll wheel (except for the iPod photo). Like many digital audio players, iPods can serve as external data storage devices when connected to a computer. The bundled software used for uploading music, photos and videos to the iPod is called iTunes. The iPod is a brand of portable media players.