An angular velocity sensor includes first and second oscillators and a coupling beam. The miniature keyboard includes a plurality of keys for providing input to a hand held computing device. To this end, at least one operation that reduces the lifetime of the memory is delayed, based on the aspect. The low viscosity component compensates for possible local deviations in the distance between both plates when the discharge vessel are assembled. The medical-information transmission part determines a second server for temporarily saving the medical information from among the notified other servers, and transmits the medical information to the second server. The stop layer is configured to be invisible to the light.