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Aperipheral device, or simply peripheral, is an auxiliary hardware device that a computer uses to transfer information externally.[1] A peripheral is a hardware component that is accessible to and controlled by a computer but is not a core component of the computer.
A peripheral can be categorized based on the direction in which information flows relative to the computer:
Many modern electronic devices, such as Internet-enabled digital watches, video game consoles, smartphones, and tablet computers, have interfaces for use as a peripheral.
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