Tech Stocks Edge Higher, Lifted by Dell  NEW YORK (Reuters) - Stocks rose slightly on Friday,  boosted by computer maker Dell Inc. &lt;A HREF="http://www.investor.reuters.com/FullQuote.aspx?ticker=DELL.O target=/stocks/quickinfo/fullquote"&gt;DELL.O&lt;/A&gt;, but gains were  small as Wall Street took a breather after Thursday's rally.