1. A system for sorting e-mail documents, the system comprising: a processor; a memory having stored thereon instructions that, when executed by the processor, perform the functions of: receiving a request to sort multiple e-mail documents according to least frequently used words in the multiple e-mail documents; analyzing the multiple e-mail documents to identify which of the multiple e-mail documents use at least one of the least frequently used words; alphabetically sorting the multiple e-mail documents, according to the least frequently used words, to create alphabetically sorted e-mail documents; and displaying the alphabetically sorted e-mail documents.