Intel Gives Centrino Chip Line a Wireless Upgrade  SAN FRANCISCO (Reuters) - Intel Corp. &lt;A HREF="http://www.reuters.co.uk/financeQuoteLookup.jhtml?ticker=INTC.O qtype=sym infotype=info qcat=news"&gt;INTC.O&lt;/A&gt; on Thursday  said it has upgraded the wireless networking capabilities of  its Centrino line of notebook computer chips to allow broader  network access with improved security. 

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