IRS13 An Analysis of the Documentation Requests 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. x-4 FREQUENCY IN TERM THESAURUS NUMBER OF REQUESTS COLLECTION (STEM) CONCEPT NO. TOTAL *VIAII *ltBl? STEM[OCRerr] RANK+ Information 1 24 11 13 998 1st Retrieval 5 14 12 2 255 14th A[OCRerr]omat 19 14 7 7 86 86th C[OCRerr]ut 3 7 2 5 326 8th Dissemination 108 6 3 3 47 124th Article 21 6 5 1 86 86th Index 4 5 1 4 424 3rd Scienc 10 5 4 1 300 [OCRerr]h * + Requests prepared by Persons A and B Frequency is based on word stems, therefore IvInformationti is the most frequent stem (Rank 1st) and is used 998 timese Eight Thesaurus Concepts Most frequently Used in the Requests Giving Frequency Data for Each [OCRerr]or Stem Figure 1.