1813 – War of 1812: American troops capture York, the capital of Upper Canada, in the Battle of York.
1981 – The Xerox Star personal computer debuted, developed by Xerox PARC, and it included the first mouse sold to consumers. Officially named Xerox Star 8010 Information System, is the first commercial personal computer to incorporate technologies that have since become standard in personal computers, including a bitmapped display, a window-based graphical user interface, icons, folders, mouse (two-button), Ethernet networking, file servers, print servers, and email. Introduced by Xerox Corporation on April 27, 1981, the name Star technically refers only to the software sold with the system for the office automation market. The 8010 workstations were also sold with software based on the programming languages Lisp and Smalltalk for the smaller research and software development market.
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