NAME: OR

        FUNCTION: Logical OR of Boolean values

        OPERAND TYPE:  Boolean

        RESULT TYPE: Boolean

        Note:  The evaluation of Logical operators is dependent on the
               status of the {B+-} compiler directive.


        When active ( {B+} ) all values are evaluated.

        For instance the statement : if ((a = b) and (c=d)) then statement;
        will check the validity of (a=b) and then check (c=d) before
        evaluating the statement of ((a=b) or (c=d)) to be true or false;

        However, if inactive ( {B-} ) then shortcircuit evaluation is used.
        In the above example, if (a=b) is found to be false then the entire
        expression ((a=b) or (c=d)) is evaluated as false and (c=d) is never
        tested.  This can prevent range-check errors;