| http://www.w3.org/ns/prov#value | - A hard disk drive 514 reads from and writes to a (typically fixed) magnetic hard disk 516; a magnetic disk drive 518 reads from and writes to a removable ???floppy??? or other magnetic disk 520; and an optical disk drive 522 reads from and, in some configurations, writes to a removable optical disk 524 such as a CD ROM or other optical media.
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