Resumen
Tens of millions of people around the world now use free software. But most of these users have never heard of the ethical reasons for which developers developed this system and built the free software community, because today this system and community are more often described as "open source," and attributed to a different philosophy in which these freedoms are hardly mentioned. Nearly all open source software is free software; the two terms describe almost the same category of software. But they stand for views based on fundamentally different values. Open source is a development methodology; free software is a social movement. As the advocates of open source draw new users into the community, free software activists must work even more to bring the issue of freedom to those new users attention.