1121: Battle of Didgori: Georgian army under King David the Builder wins a decisive victory over the renowned Seljuk commander Ilghazi

1480: Ottoman troops conquer Otranto in southern Italy after a 15-day siege, killing 12,000, enslaving 5,000, and beheading 800 Christians for refusing to convert to Islam

1851: American inventor Isaac Singer patents his famous sewing machine

1908: Ford Motor Company builds its first Model T car, which Henry Ford himself tests on a hunting trip to Wisconsin and Northern Michigan

1981: Don Estridge unveils the company’s first personal computer, the IBM PC, at New York’s Waldorf Astoria Hotel, priced at USD 1,565 with 16 kilobytes of RAM, helping bring computing to the masses

Source: Onthisday.com