000       GENERAL WORKS
            010       Bibliography
            020       Library Science
            030       General Encyclopedias
            040       General Collected Essays
            050      General Periodicals
            060       General Societies--Museums
            070       Journalism
            080       Collected Works
            090       Book Rarities
100       PHILOSOPHY AND PSYCHOLOGY
            110       Metaphysics
            120       Metaphysical Theories
            130       Fields of Psychology
            140       Philosophical Systems
            150       Psychology
            160       Logic
            170       Ethics
            180       Ancient Philosophy
            190       Modem Philosophy
200       RELIGION
            210       Natural Religion
            220       Bible
            230       Systematic/Doctrinal Theology
            240       Devotional Theology
            250       Pastoral Theology
            260       Ecclesiastical Theology
            270       Christian Church History
            280       Christian Churches and Sects
            290       Non-Christian Religions
300       SOCIAL SCIENCES--SOCIOLOGY
            310       Statistics
            320       Political Science
            330       Economics
            340       Law
            350       Public Administration
            360       Social Welfare
            370       Education
            380       Commerce
            390       Customs
400       LINGUISTICS (LANGUAGES)
             410       Comparative Linguistics
             420       English Language
             430       German Language
             440       French Language
             450       Italian Language
             460       Spanish Language
             470       Latin Language
             480       Greek Language
             490       Other Language

500       PURE SCIENCE
            510       Mathematics
            520       Astronomy
            530       Physics
            540       Chemistry
            550       Geology
            560       Paleontology
            570       Biology
            580       Botany
            590       Zoology
600       TECHNOLOGY (APPLIED SCIENCES)
            610       Medical Science
            620       Engineering
            630       Agriculture
            640       Home Economics
            650       Business and Business Methods
            660       Industrial Chemistry
            670       Manufactures
            680       Manufactures (continued)
            690       Building Construction
700      FINE ARTS AND RECREATION
            710       Landscape Gardening
            720       Architecture
            730       Sculpture
            740       Drawing
            750       Painting
            760       Printing
            770       Photography
            780       Music
            790       Recreation
800       LITERATURE
             810       American Literature
             820       English Literature
             830       German Literature
             840       French Literature
             850       Italian Literature
             860       Spanish Literature
             870       Latin Literature
             880       Greek Literature
             890       Other Countries
900       HISTORY
             910       Geography
             920       Biography
             921       Individual Biographies
             930       Ancient World History
             940       European History
             950       History of Asia
             960       African History
             970       North American History
             980       South American History
             990       History of Oceania