SEONGNAM, SOUTH KOREA—At the new headquarters of South Korea’s largest internet company, a fleet of self-driving robots whirl around delivering coffee, lunchboxes and mailed packages. More than 100 of these autonomous robots, which look a bit like the droid R2-D2 from the “Star Wars” films and go by the name “Rookie,” are operational at Naver high-rise office building. The tower is specifically designed with bump-free flooring and handle-free doors that open via sensors to help the robots move around more easily.

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