Manchester Mark I computer became the first stored computer to run a program at a lab at Manchester University, UK.
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John Hinckley, who tried to kill President Reagan, was found not guilty on the grounds of insanity.
The US Navy claimed the island of Guam, which was previously under Spanish control.
Cyrus McCormick patented the reaping machine.
The British Army defeated Irish rebels at the Battle of Vinegar Hill.
Construction on the world's longest railway in Russia was completed.
