Microsoft and IBM have squared off in dueling ad campaigns that underscore the rising threat Linux poses to Microsoft, the No. 1 software maker. Last week, Microsoft launched its first paid ad lambasting Linux, the computer operating system Microsoft executives have long derided. Such barbs have done little to slow Linux's swelling popularity.So Microsoft has begun enticing tech managers to visit a Web site brimming with surveys and testimonials illustrating how its Windows operating systems cost less to own over time than Linux.
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