The aim of UNESCO radio was to contribute to the understanding of the ideals that the Organization stands for, through discussion of issues in the field of education, science, culture and communication. Around fifteen 30-minute feature programmes were produced each year in at least three official languages of UNESCO, English, French, Spanish or Russian. Their subjects, chosen on the basis of their interest both for UNESCO and the general public, covered a vast field ranging from Aids to astronomy, from biodiversity to bioethics, from street children to indigenous peoples, from the violence of war to the culture of peace.
The recordings were offered on tape or cassette to over 400 national, public and community radios in all parts of the world (257 stations broadcasting in English, 60 in French, 60 in Spanish and 42 in Russian) as well as to international short-wave broadcasters.