Space Cadet by Robert Heinlein:
Science Fiction Inventions, Technology and Ideas

This Heinlein juvenile - a novel written particularly for the 12+ crowd - is dated but still a good story. The Space Cadets are the guardians of the solar system; only the best of the best are accepted. And how often do you get to prove yourself on Venus? Select an invention:

Atmospheric Braking
Using a planet's atmosphere to gradually decelerate a spacecraft.

Gravity Centrifuge
Used in low gravity environments to build up muscle for visits to Earth, or other high gravity worlds.

High-Frequency Oven - essence of the microwave
This describes the essence of a microwave.

Microwavable Food - pre-packaged ready to heat-n-eat
Food that is prepared specifically for use in a microwave (high-frequency) oven.

Personal Rocket Jet
A small, handheld jet pack that can be used to maneuver freely in space.

Portable Telephone - early reference
The essence of a cell phone.

 

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