Moshe Feinstein (1895 - 1986) was a Lithuanian Orthodox rabbi and scholar, who was world renowned for his expertise in halakha and was the "de facto" supreme rabbinic authority for Orthodox Jewry of North America. In the Orthodox world, it is universal to refer to him simply as "Reb Moshe." Wikipedia
The definitive Wikipedia entry for Moshe Feinstein. Wikipedia is the biggest multilingual free-content encyclopedia on the Internet. en.wikipedia.org/wiki/Moshe_Feinstein
