the relationship between 1990 census and 2000 industry occupation classification systems technical paper 65 prepared by thomas s scopp under special contract with us bureau october 30 2003 2 table of contents report page introduction 1 history revisions to industrial 3 occupational 5 creation crosswalks 6 data highlights 12 accuracy reliability 14 sources 15 appendices list 16 appendix a 17 b 25 c naics equivalents 39 d soc 47 e bibliography related texts reports 59 f glossary terms abbreviations used in this 61 system its redistribution into eeo file categories their