International Union for Quaternary Research (NQUA)

http://www.inqua.tcd.ie/

International Union of Anthropological and Ethnological Sciences (UAES)

http://www.leidenuniv.nl/fsw/iuaes/

International Union of Biochemistry and Molecular Biology (IUBMB)

http://www.iubmb.unibe.ch/

International Union of Biological Sciences (IUBS)

http://www.iubs.org/

International Union of Crystallography (IUCr)

http://www.iucr.org/

International Union of Food Science and Technology (IUFoST)

http://www.iufost.org/

International Union of Forest Organisations (IUFRO)

http://www.iufro.org/

International Union of Geodesy & Goephysics (IUGG)

http://www.iugg.org/

International Union of Geological Sciences (IUGS)

http://www.iugs.org/

International Union of the History and Philosophy of Science (IUHPS)

http://www.sic.iuhps.org/

International Union of Materials Research Societies (IUMRS)

http://www.iumrs.org/

International union of Microbiological Societies (IUMS)

http://www.nas.edu/gateway
/international/1177.html

International Union of Nutritional Sciences (IUNS)

http://www.iuns.org/

International Union of Pharmacology (IUPHAR)

http://www.iuphar.org/meetings_
2006_exec_070806.html

International Union of Physiological Sciences (IUPS)

http://www.nationalacademies.org
/gateway/international/1180.html

International Union of Phychological Sciences (IUPsyS)

http://www.am.org/iupsys/

International Union of Pure and Applied Chemistry (IUPAC)

http://www.iupac.org/

International Union of Pure and Applied Physics (IUPAP)

http://www.iupap.org/

International Union of Soil Sciences (IUSS)

http://www.iuss.org/

International Union of Theoretical and Applied Mechanics (IUTAM)

http://www.iutam.net/

International Union of Toxicology (IUTOX)

www. iutox .org

Union Radio Scientifique International (URSI)

www. ursi .org