WHAT IS THE INTERNATIONAL TELECOMMUNICATION UNION (ITU)? The internal communications requirements of Finally, the General Secretariat assists the ITU are also handled by the General Secretariat, which provides an up-to-date information technology infrastructure, information exchange services, administrative software applications and software development environments. Secretary- General in developing policies relating to personnel and human resources, providing essential advice on a wide range of matters including recruitment, staff training, counselling and post classification.