A collar coacts with a chassis, sleeve and lever of a lockset to provide a retention and reinforcement system for lock assemblies. The fabric of the present invention comprises an underlayer and a soil-resistant protection film, which can effectively prevent oil corrosion, penetration, and permeation of the surface of the fabric, thus resulting in no oil stains after wiping. The server includes an output request receiving portion for receiving an output request on a document stored in one of the document storing apparatuses; and an output destination selecting portion for selecting one of the document storing apparatuses for outputting the document corresponding to the output request.