From the project website (accessed 2016-07-06):
The Programming Historian offers novice-friendly, peer-reviewed tutorials that help humanists learn a wide range of digital tools, techniques, and workflows to facilitate their research. We regularly publish new lessons, and we always welcome proposals for new lessons on any topic. Our editorial mentors will be happy to work with you throughout the lesson writing process. If you’d like to be a reviewer or if you have suggestions to make Programming Historian a more useful resource, please see our Contribute page.