A system for controlling an external storage device connected to a computer by accepting an operation by a user via an acceptance means and encryption means for encrypting a predetermined data file stored in the external storage device, upon a particular event, is provided, is provided. Average pixel cell signal values for pixel cells within a summing window of each column or row of at least two sub-arrays are computed during read-out. The appendages on the auxiliary eyeglass frame fit beneath the temple extensions on the conventional eyeglasses frame to hold the auxiliary frames in place solely by the magnetic attractive force. The guide wire pusher allows the guide wire to be impacted into the bone before drilling and limits any possibility of drilling past the end of the guide wire.