"Internet filtering takes place in at least forty states worldwide including many countries in Asia and the Middle East and North Africa. This publication examines the political, legal, social, and cultural contexts of Internet filtering in these states from a variety of perspectives. The six introductory chapters (only available in the print version) discuss the mechanisms and politics of Internet filtering, the strengths and limitations of the technology that powers it, the relevance of international law, ethical considerations for corporations that supply states with the tools for blocking, and the implications of Internet filtering for civil society groups that increasingly rely on Internet technologies for communicating their missions. Regional overviews and reports on Internet content regulation in forty different countries follow (which are also available online), with each country profile outlining the types of content blocked by category and documenting key findings. The study relies on the results of the "OpenNet Initiative", a collaboration of the Berkman Center for Internet and Society at Harvard Law School, the Citizen Lab at the University of Toronto, the Oxford Internet Institute at Oxford University, and the University of Cambridge." (CAMECO Update 4-2008)