IBM Reported to Put Its PC Business Up for Sale  SAN FRANCISCO (Reuters) - IBM &lt;A HREF="http://www.reuters.co.uk/financeQuoteLookup.jhtml?ticker=IBM.N qtype=sym infotype=info qcat=news"&gt;IBM.N&lt;/A&gt; is reportedly in  talks to sell its personal computer business in a deal that  could be worth up to \$2 billion and would cap a gradual  withdrawal from the business it helped to pioneer in 1981.