A QSL Card from an Austrian ham radio operator
What is a QSL Card ?
In the beginning of radio communication and broadcasting, many of the radio transmissions were experimental, radio stations as well as amateur radio operators relied heavily on reception reports from their listeners. The station in turn acknowledges the listener's report with a "Verification Card"-called a QSL card. It is the short wave listener's credit to collect QSL cards from much unknown stations operating with low power equipment and those from the distant and hard to get places are the rarer QSL card, which may achieve an almost 'philatelic' value in his area. Amateur Radio or ham radio operators also exchange QSL card among themselves, because, these cards bears the testimony of the radio contact that was being established!