Shares of Aladdin Knowledge Systems ( ALDN) were among technology's losers Monday, falling 13% after the software company cut its third-quarter sales outlook. The company now expects sales of $19.5 million to $19.7 million, down from previous guidance of $19.8 million to $20.5 million. Analysts polled by Thomson First Call had been expecting sales of $20.3 million. "Year-over-year growth remains strong, while the timing of certain new business around the end of the quarter played a role in updating our top line forecast for the third quarter," the company said. Aladdin continues to expect earnings of 22 cents to 25 cents a share. Analysts are expecting earnings of 24 cents a share. Aladdin will release third-quarter results on Oct. 27. Shares were recently trading down $2.75 to $17.88. Xilinx ( XLNX) fell 15% after the chipmaker lowered its second-quarter sales outlook. The company now expects to post a sequential sales decline of 1% to 2%. Previously, the company said it would post sales that would be flat to up 4%. Xilinx attributed the sales revision to weakness in its turns business and mainstream products and a double-digit sequential sales decline from companies with manufacturing operations in the Asia Pacific region. Gross margin is still expected to be between 61% and 62%, the company said. Analysts had been expecting sales of $415.3 million, up about 3% sequentially from the $405 million in sales that Xilinx posted during the second quarter. Shares were trading down $4.07 to $23.05. Shares of Unisys ( UIS) fell 7% after the company cut its third-quarter earnings forecast. The company, which provides information-technology consulting services, now expects a loss of 16 cents to 18 cents a share. Excluding a pension expense and other charges, the company expects a loss of 5 cents to 7 cents a share. Previously, the company said it would post a profit of 4 cents to 6 cents a share. Analysts had been expecting a loss of 4 cents a share. Unisys expects sales of $1.37 billion to $1.39 billion. Analysts had been expecting sales of $1.5 billion. Sales were hurt by lower-than-expected results in its services and technology businesses. The company said it is still analyzing the reasons for the third-quarter shortfall; Unisys will discuss its plan to improve results when it announces earnings on Oct. 18. Shares were trading down 46 cents to $6.37.