This snack machine is watching you

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Next time you go out to the mall, you just may be scanned from head to toe.

Clothing and shoe stores want to scan your body parts in seconds to find your perfect size. But why do vending machines need to scan your face? In this CNET Update, learn how retailers are experimenting with high-tech sensors and gathering more data on shoppers:

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CNET Update delivers the tech news you need in under three minutes. Watch Bridget Carey every afternoon for a breakdown of the big stories, hot devices, new apps, and what’s ahead. Subscribe to the podcast via the links below.

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This snack machine is watching you