The unusual announcements from three of the technology industry`s most powerful men came just weeks apart. Microsoft Corp. Chairman Bill Gates declared that making his company`s software less vulnerable to security breaches would take precedence over adding new features. Oracle Corp.`s Larry Ellison pledged to make his company`s database programs “unbreakable.” Cisco Systems Inc.`s John Chambers told clients at a private conference that he no longer regarded security enhancements on equipment that directs traffic across the Internet as extras but as necessities. Full Story