900.1–.9 Standard subdivisions of history and geography 901–909 Standard subdivisions of history, collected accounts of events, world history 910 Geography and travel 920 Biography, genealogy, insignia 930 History of ancient world to ca. 499 940 History of Europe 950 History of Asia 960 History of Africa 970 History of North America 980 History of South America 990 History of Australasia, Pacific Ocean islands, Atlantic Ocean islands, Arctic islands, Antarctica, extraterrestrial worlds