The Radio Club Uruguayo (RCU) (in English, literally Radio Club of Uruguay) is a national non-profit organization for amateur radio enthusiasts in Uruguay. RCU was founded on August 23, 1933. The RCU operates a QSL bureau for those amateur radio operators in regular contact with amateur radio operators in other countries. Radio Club Uruguayo represents the interests of amateur radio operators in Uruguay before national and international regulatory authorities. RCU is the national member society representing Uruguay in the International Amateur Radio Union.
Amateur radio (also called ham radio) describes the use of radio frequency spectra for purposes of non-commercial exchange of messages, wireless experimentation, self-training, private recreation and emergency communication. The term "amateur" is used to specify "a duly authorised person interested in radioelectric practice with a purely personal aim and without pecuniary interest;" (either direct monetary or other similar reward) and to differentiate it from commercial broadcasting, public safety (such as police and fire), or professional two-way radio services (such as maritime, aviation, taxis, etc.).
The amateur radio service (amateur service and amateur-satellite service) is established by the International Telecommunication Union (ITU) through the International Telecommunication Regulations. National governments regulate technical and operational characteristics of transmissions and issue individual stations licenses with an identifying call sign. Prospective amateur operators are tested for their understanding of key concepts in electronics and the host government's radio regulations. Radio amateurs use a variety of voice, text, image, and data communications modes and have access to frequency allocations throughout the RF spectrum to enable communication across a city, region, country, continent, the world, or even into space.