In one implementation, a digital analog converter is monotonic because the output moves only in the direction of the input and segmented because a more significant portion of the DAC is separated from a less significant portion. The conductive film has a film and a plurality of a plurality of hydrophobic units. This facilitates the stopping of the bracket and hence the operation lever at the neutral position. The section comprises a straight, lateral cutting edge which merges into a straight, rear-sided cutting edge extending in an approximately parallel manner in relation to the front-faced cutting edge. A service mapping unit determines a service which the service-request-incompatible apparatus can provide, based on the information on the service-provision state and information on the determined service-request-incompatible apparatus.