Currently, the "International Harmonization of Rat Nomenclature" Web pages are available on two servers:

• Europe (Fraunhofer ITA Web server)
  http://www.ita.fhg.de/reni/rat_nomenclature/index.htm
  
  
• North America (STP Web site):
  http://www.toxpath.org/nomen/index.htm
  

Always use the web site which is located nearest to you.