On the day its antitrust trial got under way in Washington and 11 months after initial marketing pitches to the banking industry, Microsoft Corp. said Monday that 20 financial companies have become customers of its highly touted DNA computing framework.

Microsoft described them as "top-tier" institutions, but only a few consented to have their names disclosed. They include Citigroup's Travelers Property Casualty Corp., SunTrust Banks Inc.'s Crestar Bank subsidiary, and the securities firm Sanford C. Bernstein & Co.

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