National Societies

Country Title Web Site
Argentina SADIO www.sadio.org.ar
Australia ASOR www.asor.org.au
Austria ÖGOR www.oegor.at
Belarus BYORS  
Belgium ORBEL/Sogesci-B.V.W.B. www.orbel.be
Brazil SOBRAPO www.sobrapo.org.br
Canada CORS/SCRO www.cors.ca
Chile ICHIO  
China ORSC www.orsc.org.cn
Colombia SOCIO  
Croatia CRORS http://www.hdoi.hr
Czech Republic CSOR  
Denmark DORS www.dorsnet.dk
Estonia EstORS www.ioc.ee/matem/estors/index.html
Finland FORS www.operaatiotutkimus.fi
France ROADEF www.roadef.org/
Germany GOR http://www.gor-ev.de/
Greece HELORS www.eeee.org.gr
Hong Kong ORSHK  
Hungary HORS www.hors.hu/
Iceland ICORS  
India ORSI www.orsi.in
Iran IORS  
Ireland MSSI mis.ucd.ie/mssi
Israel ORSIS https://orsis.net.technion.ac.il/
Italy AIRO www.airo.org
Japan ORSJ www.orsj.or.jp/
Korea KORS www.korms.or.kr
Lithuania LITORS www.mii.lt/LitORS
Malaysia MSORSM http://www.msorsm.org/
Mexico SMIO http://www.smio.org.mx
Nepal ORSN http://orsn.org.np/
Netherlands NSOR www.ngb-online.nl
New Zealand ORSNZ www.orsnz.org.nz
Nigeria INFORN http://www.inforn.org.ng/ 
Norway NORS  http://www.nors-online.no
Peru SOPIOS http://sopios.org/
Philippines ORSP www.orsp.org.ph
Poland ASPORS www.ptbois.org.pl
Portugal APDIO www.apdio.pt
Serbia YUORS  
Singapore ORSS  
Slovakia SSOR  
Slovenia SDI-SOR http://www.drustvo-informatika.si/sekcije/sor/
South Africa ORSSA www.orssa.org.za
Spain SEIO www.seio.es/
Sweden SOAF www.soaf.se
Switzerland SVOR www.svor.ch/
Tunisia TORS www.tors-tn.org
Turkey ORST www.yad.org.tr
United Kingdom ORS www.theorsociety.com
United States of America INFORMS www.informs.org
Uruguay AUDIIO