Wi-Fi sends digital data as radio waves between your device and a router or access point, which connects to the wired internet. Shared IEEE 802.11 rules let devices from different makers cooperate.
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Your device measures how long signals from several satellites take to arrive, converts those times into distances, and uses them to calculate its position. At least four satellites are normally needed.
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Yes. Alexander Bain patented the core idea of the fax in 1843, about 33 years before Bell's telephone patent, though it was not yet practical for everyday use.
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