The External Relations service in the Cabinet of the Director-General was responsible for maintaining relations with member countries, non-member countries and organizations operating in the field of informatics (with or without formal cooperation agreements with the Organization). The service kept up-to-date information on the IBI's relations with these actors as well as reports on shared activities. The files consist primarily of correspondence exchanged between the IBI and the country or organization. Beyond letters, telegrams and telexes, the files include reports, brochures, and copies of agreements. The series has been arranged into three subseries:
-IBI/6/1/1 Governmental organization files
-IBI/6/1/2 Non-governmental organization files
-IBI/6/1/3 Country files