From search to security: the five most important algorithms in tech

Algorithms, simple functions that hover between mathematical problems and computer programs, are everywhere. Whether dealing with lost packets when using Wi-Fi, or getting your credit-card details securely to an online store, most consumer technology couldn’t work without some ingenious solutions to common problems. And when Google decides to change its search algorithm – as it did with Hummingbird last week, it can make or break whole companies. Here are just five which you couldn’t live without.

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