Why No Floppy Disk?

Floppy disks and CD-ROMs are used to transport software, like CDs and cassette tapes are used to
transport music, from the factory to your PC. Software that you use all the time, such as Windows XP, is
stored on the hard disk inside your computer. You never see this hard disk directly because it cannot be
removed from the computer.
When you first turn on a computer, it may check to see whether a floppy disk is in drive A (the floppy
drive). If there is a disk in that drive, the PC attempts to boot up (load the operating system) from that
floppy. If the floppy doesn’t contain an operating system, the PC won’t start. Instead, some message
such as Non-System disk or disk error. Replace and press any key when ready
appears onscreen.