Fingerprint (also known as biometric) readers have become very popular on the consumer electronics' market during the past few years, and there are lots of devices of this type out there, either standalone or built-into other products. It's now quite a well known fact that these devices have been around for some time now, although they've been generally used for military purposes, and only (relatively) recently became available (and affordable) for the consumer market. However, over time, the unique character of fingerprints gave some people the idea of using them as means of identification and access, and that's how the concept of fingerprint reader emerged (as well as the concept of biometric ID cards, but that's a completely different story and not the subject of this article). That's the reason why all the people taken into custody by the police have their fingerprints taken, as there's actually a whole science dedicated to the study and development of new means of identification of these seemingly random and barely unnoticeable lines on our fingers, a science that - in time - has helped quite a lot in solving lots of crime cases and more. Fingerprints are some of the (few) features which are unique to each individual on this planet, and have been used for decades in order to identify people, although generally in less-than-ordinary conditions, as for example in the cases when they had perpetrated some type of crime.
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