What is a GPS used for? Is a GPS accurate enough to use in an unfamiliar place?, What is a drone used for? Are drones too expensive for most people to buy?, What is a self-driving car designed to do? Is a self-driving car safe enough to use?, What is an X-ray used for? Is an X-ray machine too expensive for a small clinic?, What do people use smartphones for? Is a smartphone useful enough to use every day?, What is a VR headset used for? Is a VR headset comfortable enough to wear for hours?

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