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You probably use Wi-Fi all the time to connect to the internet through your laptop, tablet or phone. It's easy. Wi-Fi hotspots surround you as you go through your day - from school to a pizza place or coffee shop and then back home. Not so long ago, the internet wasn't as accessible. Find out how Wi-Fi works, how it became commonplace and what it might do for you in the future. Part of the High Tech Science at Home series.