A Coriolis mass flowdensity sensor is provided. A BLA group can include extensions for location-aware mobile devices. Light is sent through the lens assembly. A second embodiment includes only one leg extending from the vertical surface on which it is supported. The updating operations include updating the contents of a folder or directory in a local file system as specified in a file at a remote server on the network, and providing automatically updating and populating groups of sites or document pages organized by category.