"That address has to be unique so computers know where to find each other. ICANN coordinates these unique identifiers across the world. Without that coordination we wouldn't have one global Internet."ICANN's recent decision allowed for three Arabic countries to start using an alphabet other than the traditionally used Roman alphabet in website addresses. Click on the link above and you should see:
http://blog.icann.org/2010/05/أسماء-النطاقات-الدولية-الأولى/