| http://www.w3.org/ns/prov#value | - By way of example only, FIG. 2A illustrates a hard disk drive 241 that reads from or writes to non-removable, nonvolatile magnetic media, a magnetic disk drive 251 that reads from or writes to a removable, nonvolatile magnetic disk 252, and an optical disc drive 255 that reads from or writes to a removable, nonvolatile optical disc 256 such as a CD ROM or other optical media.
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