Linus Torvalds released the first version of the Linux operating system kernel for free on the Internet.
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Conjoined twins were successfully separated for the first time.
Norway became the first country in the world where electric cars outnumbered petrol cars.
Miss America crowned Vanessa Williams, the first black winner, in New York City.
Dutch scientist Antonie van Leeuwenhoek declared his discovery of microorganisms to the Royal Society in London.
The fourth great fire of San Francisco happened, destroying a considerable portion of the city.
