Bell Communications Research, Bellcore, claims to have created the first fully automatic computer system that enables users to retrieve and review text faster, more accurately and with greater satisfaction than printed books or existing electronic media: the SuperBook prototype includes full-context indexing, which references every place a word is used so that when the user searches for a word, it shows how many times that word appears in each section listed in the table of contents, and gives users the ability to create their own synonyms for terms used by the author and to add notes, which are then automatically indexed, and bookmarks; it was specifically developed for internal use by local telephone companies, which rely heavily on printed manuals and voluminous documents, but is also helping Bellcore researchers to understand better how electronic retrieval services would impact public telephone networks; the system will also be licensed to colleges, universities, library systems and other organisations.