| http://www.w3.org/ns/prov#value | - An interfacing device according to claim 23, said external data storage medium being connectable thereto in such a manner as to be positioned underneath said handle portion, and said handle portion being formed with a thumb rest protruding from an upper portion thereof, said thumb rest being formed with a concave portion for accommodating the thumb of a user, whereby an assembly of said interfacin
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