Apple released the first computer with a graphical user interface (GUI) called the Lisa.
Source
The state of Georgia seceded from the United States of America.
The Beatles song 'Helter Skelter' was played in court as evidence for Charles Manson's trial.
Production of the Pixar film Toy Story began.
Thomas Edison's first overhead electric lighting system began service in Roselle, New Jersey.
Earth-like calcium-rich deposits were found on Mars by NASA's Curiosity Rover.