"For years, the poster child of the anti-open source movement was Microsoft, with its proprietary software model. In recent years, however, the company has changed its views, starting an open source software lab to work on interoperability issues. It's even become a purveyor of its own open source-approved licenses. What do these efforts mean? For Sam Ramji, Microsoft's director of open source technology strategy, they indicate the company is 'open' for business."