A zoom lens has an easily bendable optical path with high optical specification performance such as a high zoom ratio, a wide-angle arrangement, a small F-number and reduced aberrations. The assembly has a pair of clamps, each clamp having a flat panel with at least two holes for allowing the binder rings to extend therethrough. One of the wireless communication stations from which signals are received by the mobile device is designated as a serving station and location information is retrieved for said serving station and at least one other neighboring station from which signals are received. The method further includes integrating access to the first sub-document into the document collection through the initiated first connection with the first server that causes execution of the first software application.