IRS13 Suffix Dictionaries chapter E. M. Keen Harvard University Gerard Salton Use, reproduction, or publication, in whole or in part, is permitted for any purpose of the United States Government. v'-21 a minimum of effort in the absence of a thesaurus dictionary, and also as probab[OCRerr] candidates for inclusion in systems in which a series of several dictionaries are pro[OCRerr]ided from which a presearch choice can be made. If the latter reason for inclusion of a stem dictionary is valid, t[OCRerr]en it would seem that a hand edited version, which would require little human effort, would probably overcome many of the detailed deficiencies that have been described.