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Coffee may be your mind-sharpening tool of choice, but some of Silicon Valley's brightest brains are relying on something substantially stronger.

How to buy tech as a present

Tech is one of the most popular types of presents you can give at Christmas, but buying gadgets for others can be tough.

The week I quit social media

OPINION: The day I gave up social media, I went on Facebook three times. 

Li-fi: 100 times faster than wi-fi

The new form of wireless tech has clocked in at speeds of up to 224 gigabits per second.

10 worst internet moments of 2015

This year, many, many things have happened online that were bad or annoying or depressing. 

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