categories</a></h3>
    <p>You can add somewhat unique categories to a setting, which means that
        only one user will have that category assigned, as long as you only use
        Addressbook commands to apply that category (and not the context menu or
        Addressbook dialog).</p>
    
    <p>Use <code>/set abUniqueCats star</code> to set the category <code>star</code>
        as unique category. That way, only one user can have that category.
        What happens is that when using an Addressbook 