1. A computer-implemented system for inclusion-based electronically stored information item cluster visual representation, comprising: a non-transitory computer readable storage medium comprising program code; and a computer processor configured coupled to the storage medium, wherein the processor is configured to execute the program code to perform steps to: maintain a set of reference electronically stored information items; select from the set a subset of the electronically stored information items, each of the reference electronically stored information items in the subset associated with a classification code, each of the classification codes associated with a visual representation different from the visual representations of the remaining classification codes; combine the subset with a set of uncoded electronically stored information items, each of the uncoded electronically stored information items associated with a visual representation different from the visual representations of the classification codes; group the combined electronically stored information items into clusters; and visually represent each of the clusters comprising displaying the visual representation associated with the code of each of the reference electronically stored information items in that cluster and the visual representation associated with each of the uncoded electronically stored information item in that cluster.