An analog performance monitoring method and circuit arrangement are adapted to approximately count a plurality of digital event pulses. This technique involves the use of a conductive probe tip scanning a SAM with a thickness of not more than a few nanometers under an electric field applied by the scanning tip with a field strength of about 109 Vm between the tip and the surface of the conductingsemiconducting substrate. The host server system includes a token generation system for generating the token, the token including the destination information for physical documents being entered into the electronic data store. The inlet edges of the channels are provided in an inwardly facing circular array around a central axis of the gas diffuser case. In another example, actuation of the release member causes both of the arms to move to the second position.