ITU is the International Telecommunication Union, formerly the International Telegraph Union.

• ITU-R = Recommendations constitute a set of international technical standards developed by the Radiocommunication Sector
• ITU-T = Recommendations constitute a set of international technical standards developed by the Telecommunication Sector

The International Telecommunication Union (ITU; ), originally the International Telegraph Union , is a specialized agency of the United Nations (UN) that is responsible for issues that concern information and communication technologies.

Istanbul Technical University (Tr. Istanbul Teknik Üniversitesi, commonly referred to as ITU or Technical University) is an international technical university located in Istanbul, Turkey. It is the world's third oldest  technical university dedicated to engineering sciences as well as social sciences recently, and is one of the most prominent educational institutions in Turkey. ITU is ranked 108th worldwide and 1st nationwide in the field of engineering/technology by THES - QS World University Rankings in 2009. Graduates of Istanbul technical university have received many TUBITAK science and TUBA awards. Numerous graduates have also become members of the academy of sciences in the U.S.A, Britain and Russia. The university's basketball team, ITUSpor, is in the Turkish Basketball Second League. The university has 39 undergraduate, 144 graduate programs, 13 colleges, 346 labs and 12 research centers. Its student-to-faculty ratio is 12:1.