What was/were vannevar bush's main contribution(s) to the development of computer technology?

Vannevar Bush was an American engineer and information visionary who first imagined home computers and hypertext. During the 1920’s, Bush and his research lab became the very distinguished builders and designers of analog computers. This analog computer was known as the differential analyzer and was used for solving differential equations. Today, Bush is remembered as a prophet in the field of computer science. He published an article and in the article, he proposed a device called Memex, which to the modern reader portends the creation of the World Wide Web and hypertext.

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Abachelors degree and associate degree