According to Pinfield (2005), open access to knowledge is free, immediate, and unrestricted availability of content. Prosser (2003) defines open access as "free and unrestricted access on the Internet to literature that scholars provide without expectation of direct payment". He stated that the reasons for open access are to accelerate research, enrich education, and share learning across rich and poor nations. To further elaborate the acknowledgement of open access in the global society, Bhaf (2010) records that, presently, there are about 1,451 of open access repositories registered in Open DOAR (http://www.opendoar.org/ ), a directory of open access repositories.