The International Amateur Radio Union (IARU) is an international confederation of national amateur radio organisations that allows a forum for common matters of concern and collectively represents matters to the International Telecommunications Union (ITU). The IARU was formed in 1925.

The IARU is organised into three regions:

• Region 1 - Europe, Middle East, Africa;
• Region 2 - Americas; 
• Region 3 - Australia, most of Asia, and Pacific Islands.

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The IARU organises and promotes radiosport activities throughout the world.

• HST - High Speed Telegraphy;
• ARDF - Amateur Radio Direction Finding;
• HF competitions ...