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TIL that on April 23 1953 Dwight D Eisenhower issued Executive Order 10450 which banned homosexuals from working for the federal government or any of its private contractors. An estimated 5000-10,000 people lost their jobs because of this policy, now known as the "lavender scare".

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Nplb TIL that Huey Lewis sued Ray Parker Jr. for plagiarism over the Ghostbusters theme song and won.
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9YJxp TIL The British inventor of the quicksort algorithm, Sir Tony Hoare, also created the null reference and called it his "billion-dollar mistake ... has led to innumerable errors, vulnerabilities, and system crashes ... probably caused a billion dollars of pain and damage in the last forty years".
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