The word "free" has shown to be very confusing, especially to people wanting to discuss funding or business model. Richard Stallman tried to attenuate the confu

The word "free" has shown to be very confusing, especially to people wanting to discuss funding or business model. Richard Stallman tried to attenuate the confusion with the following slogan: "Think 'free' as in 'free speech', not 'free beer'." When we're talking about software, "Open Source" and "Free Software" are mostly synonymous. However: The Free Software movement concerns itself with preventing software users to be at the mercy of software vendors/providers (on things where it's technically not needed). This requires, amongst other things, (unobfuscated) source code access. The Open Source movement has different goals, mostly non-ethics oriented, about a collaborative model of development. It happens that these different goals meet similar requirements, and that both movements were started by hackers initially wanting source code access.