The United Nations iLibrary holds more than 3,500 publications in all official languages of the United Nations: English, French, Spanish, Russian, Chinese and Arabic as well as bi-lingual and tri-lingual publications. These publications have been authored by the United Nations departments such as DESA, OHCHR and DPI, and agencies, funds and programs such as UNDP, ECLAC and UNFPA.

Contains, inter alia, the United Nations Treaty Series with the full texts of all treaties and international agreements registered or filed and recorded by the Secretariat since 1945, pursuant to Article 102 of the Charter.