![Free Software Fndn. on Twitter: "A great poster explaining the four freedoms of free software #FS30 http://t.co/i6zBpsM9HX" / Twitter Free Software Fndn. on Twitter: "A great poster explaining the four freedoms of free software #FS30 http://t.co/i6zBpsM9HX" / Twitter](https://pbs.twimg.com/media/CPhdXoQWwAAESXP.png)
Free Software Fndn. on Twitter: "A great poster explaining the four freedoms of free software #FS30 http://t.co/i6zBpsM9HX" / Twitter
![Matthew Skala on Twitter: "You're probably familiar with the Four Freedoms of free software, as formulated decades ago by the GNU project. Even if you don't know about them, these principles guided Matthew Skala on Twitter: "You're probably familiar with the Four Freedoms of free software, as formulated decades ago by the GNU project. Even if you don't know about them, these principles guided](https://pbs.twimg.com/media/FqJPPz5XgAY6sbL.png)
Matthew Skala on Twitter: "You're probably familiar with the Four Freedoms of free software, as formulated decades ago by the GNU project. Even if you don't know about them, these principles guided
![Support crucial free software infrastructure today! — Free Software Foundation — Working together for free software Support crucial free software infrastructure today! — Free Software Foundation — Working together for free software](http://static.fsf.org/nosvn/images/fundraising/gnu_shirt_illustration.jpg)