Google I/O とクールなURL

year url status
2015 https://events.google.com/io2015/
2014 https://www.google.com/events/io/
2013 https://developers.google.com/events/io/
2012 https://developers.google.com/events/io/2012
2011 https://www.google.com/events/io/2011/ 404
2010 https://www.google.com/events/io/2010/ 404
2009 https://www.google.com/events/io/2009/ 404
2008 https://sites.google.com/site/io/