Preferential voting or preference voting may refer to different election systems or groups of election systems. European literature mainly uses the term for open list proportional representation, Australian literature for Single Transferable Vote or for Ranked voting, and American literature for any of them. Recently, an increasing number of authors, including David Farrell, Ian McAllister and Jurij Toplak, see preferentiality as one of the characteristics by which electoral systems can be evaluated.  According to this view, all electoral methods are preferentual, but to different degrees and may even be classified according to their preferentiality. Preferential voting, when understood as one of the systems or a group of systems, may refer, among other, to:
None of the audio/visual content is hosted on this site. All media is embedded from other sites such as GoogleVideo, Wikipedia, YouTube etc. Therefore, this site has no control over the copyright issues of the streaming media.
All issues concerning copyright violations should be aimed at the sites hosting the material. This site does not host any of the streaming media and the owner has not uploaded any of the material to the video hosting servers. Anyone can find the same content on Google Video or YouTube by themselves.
The owner of this site cannot know which documentaries are in public domain, which has been uploaded to e.g. YouTube by the owner and which has been uploaded without permission. The copyright owner must contact the source if he wants his material off the Internet completely.