Judaism
Around the 1st century CE, there were several small Jewish sects: the Pharisees, Sadducees, Zealots, Essenes, and Christians. After the destruction of the Second Temple in 70 CE, these sects vanished. Christianity survived, but by breaking with Judaism and becoming a separate religion; the Pharisees survived but in the form of Rabbinic Judaism (today, known simply as "Judaism"). The Sadducees rejected the divine inspiration of the Prophets and the Writings, relying only on the Torah as divinely inspired. Consequently, a number of other core tenets of the Pharisees' belief system (which became the basis for modern Judaism), were also dismissed by the Sadducees. (The Samaritans practiced a similar religion, which is traditionally considered separate from Judaism.)
Sect
The ancient schools of fiqh or sharia in Islam are known as "madhhabs." In the beginning Islam was classically divided into three major sects. These political divisions are well known as Sunni Islam, Shia Islam and Khariji Islam. Each sect developed several distinct jurisprudence systems reflecting their own understanding of the Islamic law during the course of the history of Islam.