While free software by any other name would give you the same freedom, it makes a big difference which name we use: different words convey different ideas.

In 1998, some of the people in the free software community began using the term "open source software" instead of "free software" to describe what they do. The term "open source" quickly became associated with a different approach, a different philosophy, different values, and even a different criterion for which licenses are acceptable. The Free Software movement and the Open Source movement are today separate movements with different views and goals.

The fundamental difference between the two movements is in their values, their ways of looking at the world.