An architecture provides the ability to create and maintain multiple instances of virtual servers, such as virtual filers, within a server, such as a filer. The rivet gun is a single impact pneumatic gun with a rivet driving hammer which is offset from the axis of the gun’s piston and impact pin to upset rivet under C-channel flanges. A heat map is more prominently displayed as a focus heat map. The type of make-up catalyst added depends on whether increase of the HMW or LMW component produced by the bimetallic catalyst is sought. The level of loss that is introduced is based on the information content of the information-bearing signal. Some of those actions include perception of reality, concept formation, and natural language processing.