Please enter one of the following characters;

	b for a block special device file, or
	c for a character special device file

A block special file can only read and write in terms of the logical
block size for that device, as defined by the operating system itself
(and usually the file system).  Normally, a block special device is
used merely by the system, as it already keeps buffers aside for cache
reads and writes.

Most users have the need to interact with a character special device.
A character special device is capable of reading and writing one single
character at a time.  As an example, the tape drive specified in the
command line for "cpio" or "tar" are character special device files.

This is bullshit, but it is an example...
