hpux man page for tty

tty(7)							 Miscellaneous Information Manual						    tty(7)

NAME
       tty - controlling terminal interface

DESCRIPTION
       The  file  is, in each process, a synonym for the control terminal associated with the process group of that process, if any.  It is useful
       for programs or shell sequences that need to be sure of writing messages on the terminal no matter how output has been redirected.  It  can
       also be used for programs that demand the name of a file for output, when typed output is desired, and it is tiresome to find out what ter-
       minal is currently in use.

FILES
SEE ALSO
       termio(7).

STANDARDS CONFORMANCE
																	    tty(7)