A portal application provides access from a client to a multimedia service. A confocal microscope with such a correction device exhibits a confocal screen, which illustrates a specimen mark, whereby the plane-parallel plate is placed in front of the detector unit in the light path, in order to center the illustration of the aperture diaphragm on the detector unit. The curved side of the body portion can be any one of a hyperbolically curved side, a circular arc curved side, an elliptically curved side, or any other curve except a straight line, and any combinations of these curves. When an ESL to which the overlay is affixed is to be linked, the RFID tag is read at substantially the same time the ESL is interrogated, and the product associated with the RFID tag identifier is associated with the ESL. A packaging for a sealant placed in a ring wherein the ring is a sealant delivery device for providing a predetermined volume of sealant to the joints of the Geodesic construction.