There are many different types of research output that you can make open access. As well as articles and conference papers, there are other short-form outputs such as book chapters and working papers. You can also make long-form outputs such as monographs and theses open access. The links below will take you to how-to guides for each type of output.
As well as sharing publications, you can also make your research data open. Our sister site, Research Data Oxford, has all the details.
