A tag is a keyword or label that categorizes your question with other, similar questions. Using the right tags makes it easier for others to find and answer your question.
Questions about the SIL Open Font License
For questions about providing or disclaiming a warranty when distributing or supporting open source software.
Operating systems are basic software to use a computer. This tag should be used for questions about interaction of operating systems and open source software or open source operating systems
for questions about the philosophy behind open source and free software.
For questions about the Creative Commons CC-BY-ND (Attribution-NoDerivs) license
Questions about the Microsoft Public License
For questions about managing the financial aspects of projects, such as pricing and support.
Google code is a development environment for open source projects.
For questions about DRM, aka Digital (Rights/Restrictions) Management, and its applications to projects.
Terms of service govern the behavior and responsibilities of both user and operator.
for questions about the zlib license
The Unlicense is a public domain equivalent license.
for questions that ask about the difference between two or more licenses in a certain aspect.
For questions about small, self-contained pieces of code within the context of open projects.
for questions related to (software) development environments such as IDE's and editor and build stacks
For questions about the human management of a free/open project. Think HR departments.