A method for managing a collection of objects, comprises selecting a property which is common to all of the objects; creating a plurality of exemplar structures, at least one exemplar structure for each object; prototypically categorizing the exemplar structures; and using the exemplar structures to access information regarding said collection. Each contact comprises a holding beam with tabs formed thereon and a holding leg downwardly extending from a rear end of the holding beam. In addition, a primary surface of the air grill is positioned in spaced overlying relationship to a front bulkhead surface so as to form a gap between the primary air grill surface and the underlying front bulkhead surface. The mechanism includes a rotation type regulation member which has a plurality of contact surface sites whose distances from a rotation center are different in a radial direction with respect to the rotation center. The computer system then processes the digital image into reflow content, excluding any content within an identified header or footer.