freebsd man page for null

NULL(4) 						   BSD Kernel Interfaces Manual 						   NULL(4)

NAME
     null -- the null device

DESCRIPTION
     The null device accepts and reads data as any ordinary (and willing) file - but throws it away.  The length of the null device is always
     zero.

FILES
     /dev/null

SEE ALSO
     full(4), zero(4)

HISTORY
     A null device appeared in Version 7 AT&T UNIX.

BSD
								   June 5, 1993 							       BSD