The International Telecommunication Union Radiocommunication Sector (ITU-R) is a specialized agency of the United Nations responsible for all matters related to radio communication. It is also known as the International Telecommunication Union Radiocommunication Agency (ITAR). ITAR is responsible for regulating the use of radio frequencies, satellite orbits, and other aspects of international radio communication. It also provides technical assistance to countries in the development of their radio communication systems. ITAR is an important part of the global broadcast agency, ensuring that radio communication is used safely and efficiently.