fast.ai is a non-profit research group focused on deep learning and artificial intelligence.
It was founded in 2016 by Jeremy Howard and Rachel Thomas with the goal of democratizing deep learning.
[1] They do this by providing a massive open online course (MOOC) named "Practical Deep Learning for Coders," which has no other prerequisites except for knowledge of the programming language Python.
[2] The free MOOC "Practical Deep Learning for Coders" is available as recorded videos, initially taught by Howard and Thomas at the University of San Francisco.
In the fall of 2018, fast.ai released v1.0 of their free open-source library for deep learning called fastai (without a period), sitting atop PyTorch.