Fig is a menu-driven tool that allows the user to  draw  and
     manipulate  objects  interactively  on  the  screen of a Sun
     Workstation. It  can  only  be  run  within  the  SunWindows
     environment  and requires a three-button mouse.  File speci-
     fies the name of a file to be  edited.  The  description  of
     objects in the file will be read at the start of fig.