The Ringworld Throne by Larry Niven:
Science Fiction Inventions, Technology and Ideas

This is the third visit to the world of Ringworld, an amazing artifact - a ribbon of matter that fully surrounds a star, giving almost endless living space. Some characters from the previous books are seen; Louis Wu battles a plague of Pak Protectors (from other Known Space stories). More satisfying to Niven fans; this story is not for children. Select an invention:

Webeye - Logitech endpoint
Communications device with a camera, microphone, zoom lens, projector, etc.; can be sprayed on.

 

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