Stocks Look to Open Lower; Cisco Awaited  NEW YORK (Reuters) - U.S. stock futures pointed to a  slightly lower open on Tuesday as investors stay cautious after  last week's three-day rally and await results from networking  gear maker Cisco Systems Inc. &lt;A HREF="http://www.investor.reuters.com/FullQuote.aspx?ticker=CSCO.O target=/stocks/quickinfo/fullquote"&gt;CSCO.O&lt;/A&gt; which will set the  direction for technology stocks.