The International Amateur Radio Union (IARU) is a federation of national associations of certified radio amateurs, representing over 150 countries and separate territories around the world.

The three IARU Regions are organised to broadly mirror the structure of the International Telecommunications Union (ITU) and its related regional telecommunications organisations. The Regions comprise:
- IARU Region 1: Europe, Africa, the Middle East and Northern Asia
- IARU Region 2: The Americas
- IARU Region 3: Asia-Pacific

The IARU represents the interests of the Amateur Radio Service worldwide to relevant international organisations, promoting the interests of amateur radio and seeking to protect and enhance its spectrum privileges.

HST Championship Software now available on the Region 1 Web

The Region 1 HST Working Group has made available all the software to be used in receiving tests in future HST Championships. It can be downloaded from the HST Working Group page.

The software includes a special version of "Morse Runner", the pile-up training software, developed and made available by by Alex Shovkoplyas, VE3NEA. There is also the "Rufz" program by Mathias Kolpe, DL4MM and Alessandro Vitiello, IV3XYM, and the custom-designed HST software by Andrei Bindasov, EU7KI.