This international organisation was founded in 1946 and was created by the UN General Assembly during its first session. Its objective is to secure the well-being of children and provide community centres in developing countries with health care and maternal facilities. It is a voluntary non-profit organisation. It is financed by voluntary contributions from governments and organisations. It has its headquarters in New York, USA and has more than two hundred offices around the world.
Identify the organisation being described in the above paragraph.