Server revenue figures from both IDC Corp and Gartner Inc. for the fourth quarter and for the calendar year of 2011 indicate a continuing decline in the sales in the Reduced Instruction Set Computing (RISC)/Itanium Unix segment, as well as continuing challenges in that market segment as compared with commodity servers using processors from Intel. However, though there is thought to be increasing interest in servers based on the Advanced RISC Machine (ARM) processor, that is not what is driving the loss in market share in the RISC segment, according to an analyst who follows that market segment.

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