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Self Driving car is the most unique tech since it works by itself with voice control or from a device.

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The second most useful tech is a radar system. Radar is a detection system that uses radio waves to regulate and decide the range, angle, and velocity of an object. Radar systems can be used in military bases for detecting incoming airplanes or ships from other countries (enemies).

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The most coolest tech is Sterilization and disinfection using gamma rays because it has the energy to kill living cells and it helps with the 2020 pandemic also known as covid 19.

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A drone is the most entertaining tech as you can fly around and get a great view of the land just by flying a few feet of the ground

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WiFi is the most useful tech,because we use it every day and we can't live without it!