at Microsoft offices, 11Times Square, New York on 9 Oct 2014 – 10 Oct 2014

at Sheraton Gateway Suites O’Hare on 22 May 2012 – 25 May 2012

at Hilton Montreal Bonaventure Hotel on 27 Feb 2012 – 3 Mar 2012

at Cité Universitaire Internationale on 2 Mar 2011 – 4 Mar 2011

at Santa Clara Convention Center on 2 Nov 2010 – 4 Nov 2010

at Santa Clara Convention Center on 1 Nov 2010 – 4 Nov 2010