IOI 2009 will be held in Plovdiv, Bulgaria, 2009
IOI 2008 will be held in Alexandria, Egypt, 2008
IOI 2007 will be held in Zagreb, Croatia, 2007
IOI 2006 will be held in Mérida, Yucatán, Mexico, August 13 - 20, 2006
IOI 2005 was held in Nowy S?cz, Poland, August 18 - 25, 2005
IOI 2004 was held in Athens, Greece, September 11 - 18, 2004
IOI 2003 was held in Kenosha, Wisconsin, USA, August 16 - 23, 2003
IOI 2002 was held in Yong-In, Republic of Korea, August 18 - 25, 2002
IOI 2001 was held in Tampere, Finland, July 14 - 21, 2001
IOI 2000 was held in Beijing, People's Republic of China, September 23 - 30, 2000
IOI 1999 was held in Antalya-Belek, Turkey, October 9 - 16, 1999
IOI 1998 was held in Setúbal, Portugal, September 5 - 12, 1998
IOI 1997 was held in Cape Town, South Africa, November 30 - December 7, 1997
IOI 1996 was held in Veszprém, Hungary, July 25 - August 2, 1996
IOI 1995 was held in Eindhoven, The Netherlands, June 26 - July 3, 1995
IOI 1994 was held in Haninge, Sweden, July 3 - 10, 1994
IOI 1993 was held in Mendoza, Argentina, October 16 - 25, 1993
IOI 1992 was held in Bonn, Germany, July 11 - 21, 1992
IOI 1991 was held in Athens, Greece, May 19 - 25, 1991
IOI 1990 was held in Minsk, Belarusian SSR, Soviet Union, July 15 - 21, 1990
IOI 1989 was held in Pravetz, Bulgaria, May 16 - 19, 1989.