Unknown option: "-3" Unix manual page for unvis. (host=minya system=Darwin)
UNVIS(1)                  BSD General Commands Manual                 UNVIS(1)

NAME
     unvis -- revert a visual representation of data back to original form

SYNOPSIS
     unvis [file ...]

DESCRIPTION
     The unvis utility is the inverse function of vis(1).  It reverts a visual
     representation of data back to its original form on standard output.

SEE ALSO
     vis(1), unvis(3), vis(3)

HISTORY
     The unvis command appeared in 4.4BSD.

BSD                              June 6, 1993                              BSD