WELCOME TO THE VENN DIAGRAM DEMONSTRATION


   Venn Diagrams are used to abstract data in
   collections of numbers known as Sets.  Real
   Sets contain a positive quantity of unique
   numbers (with the exception of the Empty Set
   which has identically zero entries).

   This demo allows you to view sets and set
   operations on real integer sets which have
   been randomly generated (2 sets are generated
   upon demo startup).


   MENU OPTIONS
   ------------

   File Menu:
       Select "Quit" to close the Venn diagram
       demonstration.

   Options Menu:
       Select a set from the "View Set Data" sub-menu
       to view the set's data. You can use this option
       to verify the results of the set calculator.

   About Menu:
       Select "About Venn Demo" to view this help
       text.

   USING THE SET CALCULATOR
   ------------------------

   The Set Calculator allows you to perform
   three classical set operations on two sets
   at a time: Intersection, Subtraction, and
   Union. Intersection is the collection of
   all numbers shared commonly by any two
   sets. Union is the combination of all of
   the numbers in the two sets with replicate
   numbers excluded. Subtraction of one set
   from a second set yields the elements of the
   second set minus the intersection of the
   first and second sets.

   Set Buttons (A, B, C, etc.)
     These buttons correspond to the currently
     available sets. When you perform a set
     calculation, a new set containing the
     result of the calculation will become
     available.

   Set Operation Buttons
     These buttons are labeled with the standard
     symbols for the operations Intersection,
     Union and Subtraction. Operations are performed
     in the following order:

     [Set] [Operation] [Set] [Equals]

   Clearing Mistakes or Errors
      Click the button with the left-pointing
      arrow to remove the most recently entered
      set or operator. Click the "CE" button to
      clear the entire display.

   Set Droplist
      You can choose which set to display in the
      draw area by selecting an option from the
      droplist labeled "Currently Viewing:".