The ISOT is a prestigious symposium since 2000, which has been internationally held:
- 2019 Goa, India
- 2018 Cancún, Quintana Roo, Mexico
- 2017 Tainan, Taiwan
- 2016 Itabashi Tokyo, Japan
- 2015 Neuchâtel, Switzerland
- 2014 Seattle, USA
- 2013 Jeju, Korea
- 2012 Paris, France
- 2011 Hong Kong, China
- 2010 Toronto, Canada
- 2009 Istanbul, Turkey
- 2008 San Diego, USA
- 2007 Lausanne, Switzerland
- 2006 Providence, USA
- 2005 Sapporo, Japan
- 2004 Boston, USA
- 2003 Boston, USA
- 2002 Stuttgart, Germany
- 2001 Boston, USA
- 2000 Boston, USA
