* A definition of [yak shaving](http://projects.csail.mit.edu/gsb/old-archive/gsb-archive/gsb2000-02-11.html), which you'll often find SIPB members unwisely engaging in.
* [GNU Philosophy](http://www.gnu.org/philosophy/philosophy.html), hardline but worth reading.
* On that note, the [GPLv3](http://www.gnu.org/licenses/gpl.html) and [GPLv2](http://www.gnu.org/licenses/old-licenses/gpl-2.0.html). Dense legal style, but also worth reading once, to understand what free software is about
* A definition of [yak shaving](http://projects.csail.mit.edu/gsb/old-archive/gsb-archive/gsb2000-02-11.html), which you'll often find SIPB members unwisely engaging in.
* [GNU Philosophy](http://www.gnu.org/philosophy/philosophy.html), hardline but worth reading.
* On that note, the [GPLv3](http://www.gnu.org/licenses/gpl.html) and [GPLv2](http://www.gnu.org/licenses/old-licenses/gpl-2.0.html). Dense legal style, but also worth reading once, to understand what free software is about