Most world history books have the letter D at the beginning of the call number.
- DE - Greco-Roman World
- DF - Greece
- DG - Roman Empire & Italy
- DT - Egypt & Africa
- DS - Asia & Middle East
Most US history books have the letter E or F at the beginning of the call number.
- E - US History
- E 75-99: Native American history
- E184.5-185.98: African American history
- E186-199: Colonial America (1607-1775)
- E201-298: Revolutionary War, 1775-1783
- E300-453: Revolution to the Civil War, 1783-1861
- E441-453: Slavery and Antislavery in the United States
- E456-655: Civil War, 1861-1865
- E660-738: Late nineteenth century, 1865-1900
- E740-999: Twentieth century to present
- F - Local US History & North and South American History