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Open Access Explained on PhD Comics
Open Access 101, from Scholarly Publishing and Academic Resources Coalition by Karen Rustad.
Open-access (OA) literature is digital, online, free of charge, and free of most copyright and licensing restrictions. What makes it possible is the internet and the consent of the author or copyright-holder.
OA is entirely compatible with peer review, and all the major OA initiatives for scientific and scholarly literature insist on its importance. Just as authors of journal articles donate their labor, so do most journal editors and referees participating in peer review.
Peter Suber, Open Access Overview
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SPARC (addresses FAQ from institutions considering adopting an Open Access Policy.