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 [1]

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

Source: Onthisday.com