PECS-I : Laguna Beach, USA, Jan. 6-8, 1999

PECS-II : Sendai, Japan, Mar. 8-10, 2000

PECS-III : St Andrews, UK, Jun. 9-14, 2001

PECS-IV : Los Angeles, USA, Oct. 28-31, 2002

PECS-V : Kyoto, Japan, Mar. 7-11, 2004

PECS-VI : Pelagia, Greece, Jun. 19-24, 2005

PECS-VII : Monterey, USA, Apr. 8-11, 2007

PECS-VIII : Sydney, Australia, Apr. 5-9, 2009

PECS-IX : Granada, Spain, Sep. 26-30, 2010

PECS-X : Santa Fe, USA, Jun. 3-8, 2012

PECS-XI : Shanghai, China, May 11-15, 2014

PECS-XII: York, UK, Jul. 17-21, 2016

PECS-XIII: Tokyo, Japan, Mar. 28-31, 2023