NFC, or Near-Field Communication, is useful for all sorts of things, but you can also use it to lock or unlock your PC when you sit down to work. The Electrodog Show, over at Instructables, shows us ...

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Does anyone have this problem? Our receptionist's desk is outside our office security doors and sometimes she forgets to lock her PC when away from her desk*. We're looking for a simple-to-use RFID / ...