Computer hardware is the physical part of a computer, including the digital circuitry, as distinguished from the computer software that executes within the hardware. Most computer hardware is not seen by normal users. The most recent version of iTunes has video organization features. Discontinued versions include two 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 photo). 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"). 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. The iPod is a brand of portable media players designed and marketed by Apple 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. 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.