Program, Unit, Procedure, and Function structure
    ----------------------------------------------------------------------

    PROGRAM  ProgramName;

    USES  Library names;

    LABEL
       labels;

    CONST
       constant declarations;

    TYPE
       data type declaration;

    VAR
       variable type declarations;




         PROCEDURE ProcedureName;
         LABEL
            labels;

         CONST
            constant declarations;

         TYPE
            data type declarations;

         VAR
           variable type declarations;

         BEGIN
            procedure statements;
         END;


         FUNCTION FunctionName : DATATYPE;
         LABEL
            labels;

         CONST
            constant declarations;

         TYPE
            data type declarations;

         VAR
           variable type declarations;

         BEGIN
            function statements;
         END;


   BEGIN
      Statements;
      Procedures;
      Functions;
   END.

         The names of procedures, functions, labels, variables, types,
         and constants are unique to each procedure, function or unit
         they are declared in.

         Procedures and Functions can be nested within other procedures
         and functions.  They may also be recursive, ie. they may call
         themselves.

         ---------------------------------------------------------------
                             UNIT STRUCTURES


         UNIT UnitName;

            INTERFACE

               USES library names;

               procedure and function forward declarations;

            IMPLEMENTATION

            Procedures and functions go here

            END.