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			In the first clip, a person uses his finger to write some text on the
			wall. He then scrolls the drawing with the hand. The scrolling of the text
			illustrate a feature that would not be possible with a real board using real ink. Click on the picture to get a bigger one. Get the clip as a QuickTime movie (3.6 Mo) or an MPEG movie (1.9 Mo).  | 
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| introduction | 
			
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		second video clip | created on feb 25, 1997 by François Bérard. |