DEWEY DECIMAL SYSTEM     Melvil Dewey (1851-1931) was the librarian, educator, and creator of the Dewey Decimal Classification System. This is a system in which all recorded knowledge is divided into 10 major classes, 000 through 999. These classes are further divided into subcategories for easy reference and access. Click here to use a table with no graphics.
000 Generalities	100 Philosophy and Psychology
010 Bibliography 020 Library and Information Sciences 030 General Encyclopedias 050 Periodical Indexes 060 General Organizations 070 News Media, Journalism, Publishing 080 General Collections 090 Manuscripts and Rare Books	110 Metaphysics 120 Metaphysical Theories 130 Paranormal Phenomena (like UFO's) 140 Philosophical Topics 150 General Psychology 160 Logic 170 Ethics 180 Ancient and Medieval 190 Modern Philosophy
200 Religion	300 Social Sciences
210 Natural Theology 220 Bible Stories 230 Christian Theology 240 Devotional and Practical 250 Pastoral Theology 260 Christian Church 270 Christian Church History 280 Christian Churches and Sects 290 Comparative Religions 292 Mythology (to find Centaurs)	310 Statistics 320 Political Science 330 Economics 340 Law 350 Public Administration 360 Social Welfare 370 Education 380 Public Services and Utilities 390 Customs, Etiquette 394.2 Holidays 398 Folklore and Fairy Tales
400 Language	500 Pure Science and Mathematics
410 Comparative Linguistics 420 English and Anglo-Saxon 423 English Dictionaries 430 Germanic Languages 440 French, Provencal, Catalan 450 Italian, Rumanian 460 Spanish, Portugese 468.4 Spanish Language Reading Materials 470 Latin 480 Classical and Modern Greek 490 Other Languages	510 Mathematics 520 Astronomy 530 Physics 540 Chemistry 550 Earth Sciences 560 Paleontology 567.9 Dinosaurs 570 Anthropology and Biology 580 Botanical Sciences 590 Zoological Sciences 595.7 Insects 599 Mammals
600 Technology (Applied Science)	700 The Arts
610 Medical Sciences 612 Human Physiology 620 Engineering 629.13 Aviation and Aeronautics 629.3 Space Flight 630 Agriculture 636.7 Dogs 636.8 Cats 640 Home Economics 641.5 Cookbooks 650 Business 660 Chemical Technology 650 Business 670 Manufactures 680 Other Manufactures 690 Building Construction	710 Landscape and Civic Art 720 Architecture 730 Sculpture 740 Drawing and Decorative Arts 745.5 Handicrafts 750 Painting 760 Prints and Print Making 770 Photography 780 Music 782 Songs 784 Musical Instruments 790 Recreation 796.332 Football 796.357 Baseball
800 Literature and Grammar	900 Geography and History;
810 American Literature 811 American Poetry 820 English and Old English 821 English Poetry 822.3 Shakespeare 830 Germanic Literature 840 French, Provencal, Catalan 850 Italian, Rumanian 860 Spanish, Portugese 870 Latin and Other Italic Literatures 880 Classical and Modern Greek 890 Other Literatures	909 World History 910 Geography, Travels, Description 912 Atlases 920 Collective Biography 92 Individual Biography 930 Ancient History 932 Ancient Egypt 937 Ancient Rome 938 Ancient Greece 940 History of Europe 950 History of Asia 960 History of Africa 970 History of North America 973 United States History 980 History of South America 990 History of Other Parts of the World

LIBRARY OF CONGRESS CLASSIFICATION NUMBERS(LCCN) General Outline
A   General Works	B   Philosophy/Religion
C   Auxiliary Science of History	D   History (General & Old World)
CB   History of Civilization CC   Archaeology CS   Genealogy CT   Biography	D   World History, including World Wars DA   Great Britain DC   France DD etc.  Other Individual Countries
E-F   History of America	G   Geography, Anthropology
E   1-143 America (General) E 151-857  United States E1001-1140   Canada	GB   Physical Geography GC  Oceanography GN  Anthropology
H   Social Sciences	J   Political Science
HA   Statistics HB-HJ  Economics HM-HX  Sociology	JA-JC  Political Science JF-JQ  Constitution JX  International Law
K   Law	L   Education
M   Music	N  Fine Arts
M   Scores ML   Literature of Music MT  Musical Instruction	NA   Architecture NB  Sculpture ND  Painting
P   Language and Literature	Q   Science
PA   Classical Languages PB  Modern Languages PR  English Literature PS  American Literature	QA   Mathematics QB   Astronomy QC  Physics QD  Chemistry QE Geology QK   Botany QL Zoology QM   Human Anatomy QR  Bacteriology
R   Medicine	S   Agriculture
	SB   Plant Culture SD  Forestry SF  Animal Culture
T   Technology	U   Military Science
TA   Civil Engineering TE  Highway Engineering TJ  Mechanical Engineering TK  Electrical Engineering TL  Aeronautics, Astonautics TR  Photography TX  Home Economics
V   Naval Science	Z   Library Science

Basics of Understanding LCCN (Library of Congress Call Numbers) How books are arranged on shelves: FIRST alphabetically by the classification letters; single letters come before double letters. Thus L comes before LB. THEN numerically by the classification numbers. Thus, 60 comes before 601. FINALLY, books within the same class are divided by the cutter (author) number. The cutter (author) number is a decimal value, although the decimal point is not printed on the call number. Thus G112 comes before G3.
L 60 R2	LB 60 R2	LB 601 G112	LB 601 G3
T 5 M11	TX 56 M4G9	TX 560 M41C1	TX 560.3 M563C1	TX 560.3 M6C1
R 100 T5	RA 100 P42	RC 100 A6	RC 103 T552	RC 103 T7