Labour and Socialist International
I.S.
I.S. [i.e. Internationale Socialiste]
Internacional Socialista
International Socialist Conference
Internationale socialiste
Internazionale socialista
IS
IS [i.e. Internationale socialiste]
IS (Internationale socialiste)
S.I
Shakai Shugi Intānashonaru
SI
SI (Socialist International)
Socialist International
Socialističeskij Internacional
Socialistische Internationale
Sosyalist Enternasyonal
Sot︠s︡ialisticheskiĭ internat︠s︡ional
Sot︠s︡intern
Sozialistische Internationale
Социалистический интернационал
Социнтерн