Not long afterward, Mr. Zuckerberg approved the project, which was code-named "Wilde, " in reference to author Oscar Wilde.

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The first bomb was code-named "596, " a reference to June 1959, when Premier Nikita Khrushchev told Beijing the Soviets would not hand over a prototype of their bomb.

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They are able to code and sort these messages by project, making it easy to reference previous conversations and incorporate comments into reports, etc.

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