A memory cell configuration includes a magnetoresistive element with an annular cross-section in a layer plane, a first line and a second line. A screensaver activation condition is stored for one or more application programs on the computer. Upon receiving the response, the SeNB notifies the identifier to the terminal. The stop means and the abutment means are arranged so that when the shutter is in the extended position the abutment means and the stop means form a rigid engagement having an end attached to the shaft.