Radio ZS is a magazine for amateur radio

Amateur radio

Amateur radio is the use of designated radio frequency spectrum for purposes of private recreation, non-commercial exchange of messages, wireless experimentation, self-training, and emergency communication...

 enthusiasts, published by the South African Radio League

South African Radio League

The South African Radio League , formerly known as the South African Radio Relay League , is a non-profit organization representing the interests of amateur radio enthusiasts in South Africa...

 (SARL). It is a membership journal that is included in membership with the SARL. The magazine is currently published six times a year: at the end of January, March, May, July, September, and November. The name of the magazine is derived from the radio call sign

Call sign

In broadcasting and radio communications, a call sign is a unique designation for a transmitting station. In North America they are used as names for broadcasting stations...

 prefix block

ITU prefix

The International Telecommunication Union allocates call sign prefixes for radio and television stations of all types. They also form the basis for, but do not exactly match, aircraft registration identifiers. These prefixes are agreed upon internationally, and are a form of country code...

 assigned to South Africa

South Africa

The Republic of South Africa is a country in southern Africa. Located at the southern tip of Africa, it is divided into nine provinces, with of coastline on the Atlantic and Indian oceans...

 by the International Telecommunications Union. Most South African amateur radio operators have call signs that begin with the letters ZS.