The Dewey Decimal System

The Dewey Decimal System was created by a librarian named Melvil Dewey. It is a way to give numbers to library books so that we can find them easily.
Mr. Dewey sorted books into 10 main groups.
Ten Groups of Non-Fiction Books
000-099...General Stuff, like Encyclopedias, Libraries, Magazines,
Newspapers and Rare Books
100-199...Ideas and Feelings, like Ideas, Feelings and Values, How the Mind
Works, ESP and Supernatural, The Senses, Dreams
200-299...Religions, like Christianity, Religions of the World, Places of
Worship, Mythology
300-399...Getting along in the World, Fairy Tales, Folklore, like Money, Law,
Education, Communication, Careers, Holidays, Ecology, Family
Life, Transportation, Manners, FAIRY TALES, Folklore
400-499...Language and Speech, like Learning to Speak Foreign Languages
Dictionaries, Parts of Speech, Grammar, History of Speech
500-599...Science and Nature, like General Science, Math, Planets, Wild
Animals, Plants, Zoos, Dinosaurs, Our Bodies, Seasons/Weather,
Bugs
600-699...Technology, Useful Science, like How Things Work or Are Made,
Health and Medicines, Farming and Farm Animals, Cooking and
Taking Care of the Home, Pets and How to Care for Them
700-799...The Arts, Fun Things To Do, like Entertainment, Gardening,
Designing Buildings, Painting, Drawing, Crafts, Music, Sports,
Taking Photographs, Recreation, Acting, Singing and Dancing
800-899...Literature, like Stories from around the world, Poems, Plays, Jokes
900-999...History, Biography, Geography, like The Past, Famous People,
Travel, Ancient Civilizations, Places around the World