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Subclass E: United States by Time Period
- E11-143: America
- E75-99: Indians of North America
- E101-143: Discovery and exploration
- E151-889: United States
- E184.5-185.98: African Americans
- E187-199: Colonial British North America, 1600-1775
- E203-286: American Revolution, 1775-1783
- E300-453: Revolution to the Civil War, 1775-1861
- E303-309: 1775-1789
- E310: 1789-1809
- E311-320: George Washington Administration, 1789-1797
- E321-330: John Adams Administration, 1797-1801
- E331-337: Thomas Jefferson Administration, 1801-1809
- E337.5-340: 19th century (General)
- E341-370: James Madison Administration, 1809-1817
- E371-375: James Monroe Administration, 1817-1825
- E376-377: John Quincy Adams Administration, 1825-1829
- E380-385: Andrew Jackson Administration, 1829-1837
- E386-390: Martin Van Buren Administration, 1837-1841
- E391-400: William Henry Harrison and John Tyler Administrations, 1841-1845
- E401-415.2: Mexican-American War, 1846-1848
- E415.6-: Middle 19th century, 1845/1848-1861
- E441-453: Slavery in the United States. Anti-slavery movements
- E456-655: Civil War period, 1861-1865
- E483.5-487: Confederate States of America
- E491-585: Armies and soldiers
- E591-596: Naval history
- E661: Foreign relations
- E660-738: Late 19th century
- E663-E664: Biography of U.S. statesmen
- E668: Reconstruction, 1865-1877
- E671-E680: Grant Administration, 1869-1877
- E711-E738: McKinley Administration, 1897-1901
- E713: American annexation in 1898 of Hawaii, the Phillippines, and Puerto Rico
- E714-735: War of 1898 (Spanish-American War)
- E740-E837.7: 20th century
- E741-E748: General
- E743.5: Anti-communist movements
- E744-744.5: Foreign relations
- E747-748: Biographies
- E756-760: Theodore Roosevelt Administration, 1901-1909
- E766-783: Woodrow Wilson Administration, 1913-1921
- E784-805: Harding- Coolidge- Hoover Era, 1919-1933
- E785-786: Harding Administration, 1921-1923
- E791-796: Coolidge Administration, 1923-1929
- E806-812: Franklin Delano Roosevelt Administration, 1933-1945
- E813-816: Truman Administration, 1945-1953
- E835-837.7: Eisenhower Administration, 1953-1961
- E838-889: Later 20th century, 1961-2000
- E838-840.8: General
- E841-843: Kennedy Administration, 1961-1963
- E846-851: Johnson Administration, 1963-1969
- E855-861: Nixon Administration, 1969-1974
- E860-861: Watergate affair. Resignation
- E895- : 21st century
- E902-906: George W. Bush Administration, 2001-2009
- E907-909: Barack Obama Administration, 2009-2017
- E912-915: Donald Trump Administration, 2017-2021
- E916-919: Joseph Biden Administration, 2021-
Subclass F: United States Regions, States, Counties, etc.
- F1-105: New England
- F1-15: General
- F16-30: Maine
- F31-45: New Hampshire
- F46-60: Vermont
- F61-75: Massachusetts
- F76-90: Rhode Island
- F91-105: Connecticut
- F106-205: Middle Atlantic states
- F106: General
- F116-130: New York
- F128-129.A1: New York City
- F131-145: New Jersey
- F146-160: Pennsylvania
- F161-175: Delaware
- F176-190: Maryland
- F191-205: District of Columbia
- F206-295: South Atlantic states
- F206-220: General
- F221-235: Virginia
- F236-250: West Virginia
- F251-265: North Carolina
- F266-280: South Carolina
- F281-295: Georgia
- F296: Gulf states
- F301-320: Florida
- F321-335: Alabama
- F336-350: Mississippi
- F350.3-358: Mississippi River Valley. Middle West
- F352: To 1803
- F353: 1803-1865
- F354: 1865-1950
- F355: 1950-
- F366-380: Louisiana
- F381-395: Texas
- F396: Old Southwest. Lower Mississippi Valley
- F406-420: Arkansas
- F431-445: Tennessee
- F446-460: Kentucky
- F461-475.A1: Missouri
- F475.A2-485: Old Northwest. Northwest Territory
- F486-520: Ohio
- F521-535: Indiana
- F536-550.Z: Illinois
- F550.5-558.2: Great Lakes region
- F561-575: Michigan
- F576-590.Z: Wisconsin
- F590.2-596.3: The West. Trans-Mississippi region. Great Plains
- F592.3-592.7: Lewis and Clark expedition
- F597: Northwest
- F598: Missouri River Valley
- F601-615: Minnesota
- F616-630: Iowa
- F631-645: North Dakota
- F646-660: South Dakota
- F661-675: Nebraska
- F676-690: Kansas
- F691-705: Oklahoma
- F718: Pacific and Mountain states
- F721: Rocky Mountains
- F726-740: Montana
- F741-755: Idaho
- F756-770: Wyoming
- F771-785.Z: Colorado
- F785.15-788: New Southwest. Southwestern states
- F789-790: Great Basin
- F791-805: New Mexico
- F806-820: Arizona
- F821-835: Utah
- F836-850.Z: Nevada
- F850.5-:855.2 Pacific states
- F856-870: California
- F868.L8: Los Angeles County
- F869.L8-L89: Los Angeles (City)
- F871-885: Oregon
- F886-900: Washington (State)
- F901-951: Alaska
- Hawaii is classed under DU620+
Subclass F: British America
Subclass F: Latin America
- F1201-1392: Mexico
- F1232-1236: By time time period
- F1240-1391: By region, state, territory, etc.
- F1401-1419: General (Latin America)
- F1421-1577: Central America
- F1601-2191: West Indies
- F1751-1855: Cuba
- F1900-1941: Haiti (Island). Hispaniola
- F1912-1930: Haiti
- F1931-1941: Dominican Republic
- F1951-1983: Puerto Rico
- F2201-3799: South America
- F2251-2299: Colombia
- F2301-2349: Venezuela
- F2351-2471: Guiana
- F2501-2659: Brazil
- F2661-2699: Paraguay
- F2701-2799: Uruguay
- F2801-3032: Argentina
- F3051-3285: Chile
- F3301-3359: Bolivia
- F3401-3619: Peru
- F3701-3799: Ecuador
