<div dir="ltr">The first kind of Open Access (OA) button is the “request eprint” button, built into EPrints institutional repository software (or, the request copy button in DSpace software). This button has also been referred to as the Fair Dealing Button, or the Fair Use Button.<br>
<br>Stevan Harnad has, especially since 1994, been a passionate advocate for OA. He has also repeatedly pointed out the virtues of Green OA, preferably via an Immediate-Deposit/Optional-Access mandate (ID/OA). This mandate is based on the deposition of articles into freely-accessible institutional repositories.<div>
<br><a href="http://tillje.wordpress.com/2013/12/29/two-different-kinds-of-open-access-buttons/">http://tillje.wordpress.com/2013/12/29/two-different-kinds-of-open-access-buttons/</a></div></div>