The Economic and Social Council (also known as ECOSOC) is one of the six main organs of the UN, as established in the Charter of 1946. It is the main UN body regarding the coordination and review of international economic and social policies. ECOSOC has 54 members elected by the General Assembly for 3 year terms.
The Human Rights Council (also known as HRC) is an inter-governmental body within the UN system. It is composed of 47 members elected to 3 year terms. The HRC is tasked not only with promoting the implementation of human rights around the world, but is also responsible for overseeing their implementation and providing recommendations to member states.
The United Nations General Assembly First committee (also known as the Disarmament and International Security Committee or DISEC)