An MICR reader is an example of a:

An MICR (Magnetic Ink Character Recognition) reader is a specialized input device used primarily in the banking and finance sector to read magnetic characters printed on checks and other documents. This technology allows the automatic reading of the unique numbers on checks, such as account numbers and routing numbers, which are printed using magnetic ink.

Its classification as an input device aligns with its primary function: capturing data from documents for processing. When a check is passed through an MICR reader, it scans the magnetic ink characters, interpreting the data so it can be processed by the financial institution's information systems. This enhances efficiency and accuracy in the processing of checks, reducing the potential for errors that can occur with manual data entry.

In contrast, data processing output devices typically present information (like monitors or printers), networking devices facilitate communication between systems (like routers and switches), and storage devices are used for saving data (like hard drives and SSDs). Therefore, the definition and function of an MICR reader clearly categorize it as an input device.