| http://www.w3.org/ns/prov#value | - By way of example only, FIG. 1 illustrates a hard disk drive 141 that reads from or writes to non-removable, nonvolatile magnetic media, a magnetic disk drive 151 that reads from or writes to a removable, nonvolatile magnetic disk 152 , and an optic al disk drive 155 that reads from or writes to a re movable, nonvolatile optical disk 156 such as a CD ROM or other optical media.
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