Dewey Decimal System (abbreviated)

• 000 General Knowledge
• 000 Computers, Oddities- Loch Ness, Bigfoot, UFOs, Aliens
• 030 Encyclopedias & World Record Books
• 060 Museums

• 100 Philosophy
• 130 Dreams, Ghosts & the Supernatural
• 150 Optical Illusions & Feelings
• 170 Emotions & Values

•  200 Religion
• 220 Christian Bible Stories
• 290 Mythology & World Religions

• 300 Social Sciences
•  300 Social Issues (Immigration, Racism, World Cultures)
•  310 Almanacs
• 320 Government
• 330 Money, Careers
• 340 Court System, Famous Trials
• 350 Armed Forces (Army, Navy, Air Force, etc.)
• 360 Drugs, Environmental Issues, Police, Firefighters
• 370 Schools
• 380 Transportation
• 390 Holidays, Folktales, Fairy Tales

• 400 Languages
• 400 Language
• 410 Sign Language
• 420 Dictionaries, Grammar
• 430 German Language
• 440 French Language
• 450 Italian Language
• 460 Spanish Language
• 490 Hieroglyphics, World Languages

• 500 Science and Math
•  500 Science Experiments
• 510 Mathematics
• 520 Stars, Planets, Astronomy & Space
• 530 Physical Science (force & motion, electricity, magnetism, light)
• 540 Chemistry, Atoms & Molecules, Rocks & Minerals
• 550 Volcanoes, Earthquakes, Weather, Hurricanes, Tornadoes
• 560 Dinosaurs, Prehistoric Animals, Fossils
• 570 Forests, Rain Forests, Deserts, Mountains, Oceans
• 580 Plants, Flowers & Trees
• 590 Zoology
• 592 Worms & Invertebrates
• 593 Corals, Sea Invertebrates
• 594 Seashells, Snails, Octopus
• 595 Insects & Arachnids
• 597 Fish, Amphibians & Reptiles
• 598 Birds
• 599 Mammals of the Land and Sea

• 600 People Using Science & Technology
• 600 Inventions
• 610 Human Body & Health
• 620 Rockets, Trains, Cars, Trucks
• 630 Farming
• 631 Farming Equipment
• 633 Crops
• 634 Forestry
• 635 Gardening
• 636 Animals (Livestock, Pets)
• 639 Hunting, Fishing, Conservation
• 640 Cooking & Sewing
• 680 Woodworking
• 690 Building

• 700 Arts & Recreation
• 710 Art History
• 730 Origami & Paper Crafts
• 740 Drawing & Crafts
• 750 Painting 
• 770 Photography
• 780 Music
• 790 Recreation
• 793 Indoor Games
• 796 Outdoor Sports (Football, Baseball, Basketball, Soccer)
• 797 Water & Air Sports
• 799 Fishing, Hunting, Shooting

• 800 Literature
• 810 Poetry, Plays, Jokes & Riddles 
• 890 Haiku

• 900 Geography & History
• 910 Explorers & Atlases
• 920 Biographies
• 930 Ancient Civilizations
• 940 European History & Countries
• 950 Asian & Middle Eastern History & Countries
• 960 African History & Countries
• 970 North American History & Countries
• 980 South American History & Countries
• 990 Australian & Pacific Island History & Countries