Revolution OS Posted on 2005-06-03 | <embed id=VideoPlayback src=http://video.google.com/googleplayer.swf?docid=7707585592627775409&hl=en&fs=true style=width:400px;height:326px allowFullScreen=true allowScriptAccess=always type=application/x-shockwave-flash> </embed> The Cathedral and the Bazaar (教堂与集市)