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user_id=54168
Originator: YES

There's some explanation at http://everything2.com/index.pl?node=character%20device
including the list

* CON: Maps to the screen for write, to the keyboard for read. CON is short for console.
* NUL: Data sink. Always empty on read, disposes of data written. Corresponds to /dev/null in Unix.
* LPT1, LPT2, LPT3: Maps to the first three printer ports. LPT stands for Line PrinTer.
* COM1, COM2, COM3, COM4: Maps to the first four serial communication ports.
* AUX, PRN: Maps to the first serial communication port and first printer port, respectively.