An open access article published under the Creative Commons Attribution License and with unrestricted use. This article provides an overview and detailed descriptions of open knowledge, open data, and the open data movement.

http://www.plosbiology.org/article/info%3Adoi%2F10.1371%2Fjournal.pbio.1001195

http://thecostofknowledge.com/

For years, scientists and academics have petitioned against Elsevier journal, as its subscription fee is extraordinarily high and it supports SOPA and PIPA (previously also the Research Works Act, in which Elsevier has withdrawn its support), which restricts open access of knowledge. The following website includes some figures in the universities in UK. What do you think about this?

http://access.okfn.org/2014/04/24/the-cost-of-academic-publishing/