The History Working Papers Project (HWPP) is an online space for scholars to share works-in-progress with their peers. After uploading a conference paper, essay, or article manuscript to the HWPP website, authors can invite others to read their work and make comments in the margins. As more people respond, writers get more feedback. But, unlike traditional comments done on paper, HWPP allows commenters and authors to interact with each other. They can read each other’s marginalia and engage in dialogue about it. In fact, entire threaded discussions can take place in the margins.