"Free Software is often referred to as "Open Source."
This is a result of an attempt by the Open Source Initiative (OSI)
to create a marketing campaign for Free Software.
The OSI set out to maintain the integrity of the movement and
prevent abuse by proprietary vendors by introducing "Open Source"
as a trademark for Free Software; but this initiative failed.
Examining the development of the Open Source Initative after
three years, it becomes apparent that the reasons to prefer the
term Free Software have become even more true. Speaking of Free
Software or the equivalent term in other languages offers many
advantages, which we explain below."