NDOWS</a> 
 </PRE>
<h4><a name="Keywords">Keywords</a></h4>
<PRE>
 
   WINDOWS 
 

</PRE>
<h4><a name="Brief_I/O">Brief_I/O</a></h4>
<PRE>
 
   VARIABLE  I/O  DESCRIPTION 
   --------  ---  -------------------------------------------------- 
   a, 
   b          I   Input windows. 
   c          O   Difference of a and b. 
 </PRE>
<h4><a name="Detailed_Input">Detailed_Input</a></h4>
<PRE>
 
   a, 
   b           are CSPICE windows, each of which contains zero or more 
               intervals. 
 
          