Physics Library is a virtual community which aims to help make physics knowledge more accessible. Physics Library's content is created collaboratively: the main feature is the physics encyclopedia with entries written and reviewed by members. The entries are contributed under the terms of the Creative Commons Attribution-ShareAlike CC BY-SA 4.0 License .

Physics Library entries are written in LaTeX, the lingua franca of the worldwide mathematics community. All of the entries are automatically cross-referenced with each other, and the entire corpus is kept updated in real-time.