The City and the Stars by Arthur C. Clarke:
Science Fiction Inventions, Technology and Ideas

The novel takes place in the distant future on Earth; only the city of Diaspar is left, according to the lore of the city. Diaspar is an entirely enclosed city run by a central computer, which generates bodies for its inhabitants to live in, and stores the accomplishments in memory forever. Excellent story. Select an invention:

Central Computer

Diaspar Memory - everyone gets a copy

Matter Organizer

Saga - very early virtual reality reference

Virtual Immortality

 

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