The aim of open access journal publishing is making high-quality, peer-reviewed scholarly content available free on the web. Find out more...
Repositories are intended to complement, rather then replace, other forms of publication. They can contain preprints, postprints, and various forms of "gray literature" (conference papers, datasets, etc.). Thus one may often publish in a standard, high-impact journal, and yet also place the article or some form of it in a freely available public archive. Typically, digital repositories are set up and maintained by an institution like a university for its scholarly community, although disciplinary repositories like arXiv.org, for the physics, mathematics, computer science and quantitative biology communities also exist.
The primary goals of institutional repositories are:
The University of Illinois has recently launched IDEALS, an institutional repository for the U of Illinois scholarly community. To find out more about institutional repositories, see Clifford Lynch's Institutional Repositories: Essential Infrastructure for Scholarship in the Digital Age