The state of California began issuing marriage licenses to same-sex couples.
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IBM was founded as the Computing-Tabulating-Recording Company in Endicott, New York.
The longest papal reign began when Pope Pius IX was elected.
Henry Ford and 12 investors incorporated the Ford Motor Company in Detroit, Michigan.
Washington National Airport became the US first federal airport.
The rules for the Grammy Awards were updated to restrict AI-generated songs.
