| http://www.w3.org/ns/prov#value | - Viewing in still another aspect, the present invention is a method for preventing unauthorized access to a PC by connecting a remotely-controlled second switch in series between the main switch in the PC and the power supply and switching the second switch ON or OFF through a hand-held coded transmitter; this transmitter transmits, one at a time, a first signal (actuating the second switch) and a
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