 multiple drives.</P>
<P>
It is up to the specific UI how the user may extend a selection. In OSF/Motif, the user may select another item in tandem with a special keystroke (the SHIFT key) to extend the selection from one item to several. Extending a selection to an already selected item will deselect that item, leaving any other items unchanged.</P>


<H3 CLASS="HeadingD">
<A NAME="IX_Non-exclusive lists">
 </A>
Non-Exclusive Lists</H3>
<P>
Non-exclusive lists are designed for cases in which any or all of 