According to Craig Mundie, Microsoft's chief technical officer, as the open-source movement grows, it will get better at producing free clones of commercial software.

ECONOMIST: Software

Dries Buytaert is chief technology officer at Acquia, a commercial open source software company providing products, services and technical support for the open source Drupal social publishing system.

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Brian Behlendorf, founder and chief technology officer of CollabNet, says that the open-source ethos allows programmers, particularly those collaborating from different locations, to work together more efficiently.

ECONOMIST: The software-development industry