Device file
interface to a device driver that appears in a file system as if it were an ordinary file; e.g. /dev/* in Unix-like systems; CON, PRN, NUL in DOS/Windows From Wikipedia, the free encyclopedia
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In some operating systems, a device file or special file is a file on the file system that can be used to access and control devices, such as printers or scanners. This is common on UNIX-like operating systems such as Linux.
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