US librarian
inventor and eponym of Dewey Decimal system
wrote "A Classification and Subject Index for Cataloguing and Arranging the Books and Pamphlets of a Library" 1876
founded School of Library Economy at Columbia College 1887
secretary and treasurer of board of regents of State University of New York 1888-1906
president of American Library Association 1890-1891, 1892-1893
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