Conflating ‘open source’ and ‘free software’ undermines free software.
In the open source universe, using terms such as FLOSS (Free/Libre and Open Source Software) is common and represents a casual conflation of the terms open source and free software, which are often used interchangeably. I would be remiss if I didn’t also admit that I have been guilty of same. I won’t be doing that anymore—or at least I’ll try not to—for a simple reason: Using the terms interchangeably is dangerous to the goals of free software and open media advocates (read “anti-DRM”). To continue this practice is to undermine beliefs that are fundamental to free software and associated movement.
Read more at OpenSource.com