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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