1. A system for providing reference documents as a suggestion for classifying uncoded electronically stored information, comprising: a database to store a reference set comprising electronically stored information items each associated with a classification code; a cluster module to designate clusters of uncoded electronically stored information items; a similarity module to compare one or more of the uncoded electronically stored information items from at least one cluster to the reference set and to identify at least one of the electronically stored information items in the reference set that is similar to the one or more uncoded electronically stored information items; an injection module to inject the similar electronically stored information items into the at least one cluster; and a display to visually depict relationships between the uncoded electronically stored information items and the similar electronically stored information items in the at least one cluster as suggestions for classifying the uncoded electronically stored information items.