How and why to work with the Linux kernel community
What is Free Software?

Software that is 
available in source code
is licensed in a way to allow unlimited distribution
allows modifications, and distribution of modifications
is not freeware, but copyrighted work
subject to license conditions, like any proprietary software
READ THE LICENSE

What is Open Source?
Practically speaking, not much difference
Remainder of this presentation will use the term FOSS (Free and Open Source Software)