| http://www.w3.org/ns/prov#value | - Each buyer computer 20 includes an input device 21, an output device 22, random access memory (RAM) 24, read-only memory (ROM) 26, CD-ROM, hard drive, or other magnetic or optical storage media 28 or other appropriate volatile or nonvolatile storage and retrieval devices, and a processor 30 having a system clock or other suitable timing device or software.
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