Sherut haBitachon haKlali (, General Security Service), better known by the acronym Shabak (, , ), in English as the Israel Security Agency (ISA) or the Shin Bet (a two-letter Hebrew abbreviation of the name), is Israel's internal security service. Its motto is "Magen VeLo Yera'e" (, lit. "Defender that shall not be seen" or "The unseen shield"). It is one of three principal organizations of the Israeli Intelligence Community, alongside Aman (military intelligence) and the Mossad (foreign intelligence service). Shin Bet's special operations unit is Yamas.