<td style="vertical-align:top; width:25%">
<categorytree mode=pages hideprefix="always" namespaces="HowTo" showcount="off" style="margin-left:1ex; border:0px solid gray; padding:0.7ex; background-color:white;">OLE</categorytree>
</td>
<td style="vertical-align:top; width:25%">
<categorytree mode=pages hideprefix="always" namespaces="HowTo" showcount="off" style="margin-left:1ex; border:0px solid gray; padding:0.7ex; background-color:white;">OPC</categorytree>
</td>
<td style="vertical-align:top; width:25%">
<categorytree mode=pages hideprefix="always" namespaces="HowTo" showcount="off" style="margin-left:1ex; border:0px solid gray; padding:0.7ex; background-color:white;">XML</categorytree>
</td>
</tr>