~::the major and minor part::~

• HARD DISK
  

Hard disk is the main part in the portable media centers. It can store changing digital information in a permanent form. They give computers the ability to remember things when the power goes out. The magnetic medium can be easily erased and rewritten, and it will "remember" the magnetic flux patterns stored onto the medium for many years. Hard disks have a hard platter that holds the magnetic medium, as opposed to the flexible plastic film found in tapes and floppies. It also has electronic board. In the hard disk, three platters are required to make it function. Data is stored onto the disk in the form of files. A file is simply a named collection of bytes.

• SCREEN

Screen is important to figure out the picture from the album and also see the song tracks. The screen is made from glass and can display the tracks, picture, figure, and so on. We can press the button to choose any option that have in the gadget. Enter the PMC-120, iRiver's Windows Portable Media Center-based media player. Like the PMP-140, the PMC's screen takes centre stage. At 3.5in, it's big enough to watch the odd television show, however we wouldn't recommend watching the Lord of the Rings trilogy on it. On either side of the screen are the player's controls. iRiver has decided to have a different look at feel for the PMC-120 over its Linux-based machine.