First Summary (The Ten Main Classes) | |||||||||||||||||||||
| 000 : Computers, information, & general works | |||||||||||||||||||||
| 100 : Philosophy & psychology | |||||||||||||||||||||
| 200 : Religion | |||||||||||||||||||||
| 300 : Social sciences | |||||||||||||||||||||
| 400 : Language | |||||||||||||||||||||
| 500 : Science | |||||||||||||||||||||
| 600 : Technology | |||||||||||||||||||||
| 700 : Arts & recreation | |||||||||||||||||||||
| 800 : Literature | |||||||||||||||||||||
| 900 : History & geography | |||||||||||||||||||||
Second Summary (The Hundred Divisions)
900 : History
| 910 : Geography & travel
| 920 : Biography & genealogy
| 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 other areas |
| 970 : History of North America | 971 : Canada | 972 : Middle America; Mexico | 973 : United States | 974 : Northeastern United States | 975 : Southeastern United States | 976 : South central United States | 977 : North central United States | 978 : Western United States | 979 : Great Basin & Pacific Slope region |