World Informo is the 4th Wing of USO which serves as the official mouthpiece of the organisation. It made its maiden appearance as a quarterly in 1953 but by mid-1957 it was converted to a monthly publicising the activities of the USO among schools. Copies of World Informo are mailed to nearly 76,000 Kendriya Vidyalayas, Jawahar Navodya Vidyalayas, D.A.V. High and Higher Secondary Schools, Ramjas High and Higher Secondary Schools/Junior Colleges, Unesco Clubs, Member Schools Secondary Schools etc. in India.

It has been approved by the State Governments of Andhra Pradesh, Assam, Bihar, Delhi, Goa, Haryana, Himachal Pradesh, Jammu & Kashmir, Karnatka, Kerala,Madhya Pradesh,Manipur, Punjab,Tripura,Tamil Nadu,Uttar Pradesh and the Union Territories of Chandigrah, Daman and Diu. World Informo is registered with the Registrar of Newspapers and with the Chief Post Master General, Delhi Circle and enjoys the concessional rate of postage.