UN, UNIDO, WHO, & International Civil Aviation, International Maritime, and World Meteorological organizations use Flat Earth in Emblem

Organizations using flat Earth map in their logo, emblem etc.
UN:
UN logo

UNIDO:
UNIDO logo

WHO:
WHO emblem

International Civil Aviation Organization:
International Civil Aviation Organization logo

International Maritime Organization:
International Maritime Organization logo

World Meteorological Organization:
World Meteorological Organization logo