1. Dewey Decimal System A system used in libraries for organizing nonfiction works into categories.

2. 000-099 General Works 001.9Weird Stuff like UFO & Loch Ness Monster 001.6Computers 004The Internet 020Library 060Museums 070Newspapers

3. 100-199 Philosophy & Psychology 133.1Ghosts 133.5Astrology 152.1Optical Illusions 152.4Feelings 158Friendship

4. 200-299 Religion & Mythology 200Bible Stories 280Christianity 290 Mythology 292Judaism 296 Islam

5. 300-399 Social Sciences 305.8Native Americans 306Families 320’sGovernment 330’sCareers 332.4Money 355-359Army & Navy 363Environment 363.23Police 363.37Firemen 394.2Holidays 398.2 Fairy Tales

6. 400-499 Languages 419 Sign Language 423 Dictionaries 430 German 440 French 450 Italian 460 Spanish 461.7 Russian 492 Hebrew 495.1 Chinese 495.6 Japanese

7. 500-599 Math & Science 507.8Science Experiments 510’sMath 520’sPlanets & Stars 551.2Volcanoes 551.5Weather 567.9Dinosaurs 582Trees 595.4Spiders 595.7Insects 597.3Sharks 598.2Birds 599.5Whales & dolphins 599.6Elephants 599.7Bears 599.8Monkeys

8. 600-699 Applied Science (Technology) 608Inventions 610’sThe human body 623Boats 625Trains 629’sVehicles: Airplanes, Helicopters, Cars, Trucks, Spacecraft 636.1Horses 636.2Cows 636.4Pigs 636.7Dogs 636.8Cats

9. 700-799 Arts & Recreation 741Drawing 745.5Crafts 784Song books 792.8Ballet 793.8Magic Tricks 794 Games 796.2Skateboarding 796.32 Basketball 796.33 Football 796.334 Soccer 796.357 Baseball 796.962 Hockey 796.9 Snowboarding 798.2 Horseback Riding

10. 800-899 Literature 808 Writing 808.81 Poetry 818.54 Jokes and Riddles

11. 900-999 History, Geography, Biography 910.4 Shipwrecks 910.4 Pirates 914-916 Countries 917 United States 917.74 Michigan 929.9 Flags 932Ancient Egypt & Mummies 940Middle Ages and Knights 973US History 978Cowboys & the Wild West 998Arctic & Antarctica