IRS13 Scientific Report No. IRS-13 Information Storage and Retrieval 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. VI-15 CONCEPT CLASSES IN DICTIONARIES STEM As % COLLECTION SUFFIX `S' STEM OF SUFFIX `5' AND SIZE IRE-3, 780 5,150 3,933 76.[OCRerr] ADI Text, 82 7,615 5,6[OCRerr] 73.6% Cran-1, 200 3,181 2,628 82.6% Comparisons of Stem and Suffix `5' Dictionary Sizes on the Three Collections. Figure 9.