List of aircraft carrier classes of the United States Navy
On November 14, 1910, pilot Eugene Burton Ely took off in a Curtiss plane from the bow of Birmingham and later landed a Curtiss Model D on Pennsylvania on January 18, 1911. In fiscal year (FY) 1920, Congress approved a conversion of collier Jupiter into a ship designed for launching and recovering of airplanes at sea—the first aircraft carrier of the United States Navy.
Source: Wikipedia — List of aircraft carrier classes of the United States Navy (CC BY-SA 4.0)