34. A computer system having a computer that executes a computer program causing the computer system to perform a method comprising: causing a display of a hub corresponding to a primary item in a position on at least one computer display; identifying a predetermined number of secondary items associated with the primary item; causing a display of a plurality of primary nodes around the hub on the at least one computer display, each of the plurality of primary nodes corresponding to an individual secondary item; causing a display of a plurality of primary tethers, each of the plurality of primary tethers extending between the hub and one of the plurality of primary nodes; accepting a selection of at least one primary node; identifying a predetermined number of tertiary items associated with the secondary item corresponding to the selected primary node; repositioning the hub and at least one of the primary nodes on the at least one computer display, wherein the selected primary node is repositioned to the position; causing a display of a plurality of secondary nodes around the selected primary node, each of the plurality of secondary nodes corresponding to an individual tertiary item; causing a display of a plurality of secondary tethers, each of the plurality of secondary tethers extending between the selected primary node and one of the plurality of secondary nodes; accepting a selection of a location on the at least one computer display; and moving at least one of the hub, one of the primary nodes or one of the secondary nodes in a direction parallel to a line extending between the position and the location on the at least one computer display, and in a distance equal to the distance between the position and the location on the computer display.
35. The computer system according to claim 34 , wherein at least one of a location, a size, a shape or a dimension of at least one of the plurality of primary nodes is determined based at least in part on a degree of association between the primary item and the secondary item corresponding to the at least one of the plurality of primary nodes.