It may be the ultimate SOS--Morse Code is in distress. The language of dots and dashes has been the lingua franca of amateur radio, a vibrant community of technology buffs and hobbyists who have ...

Technically “SOS,” doesn’t officially stand for any of these phrases. It’s the international abbreviation for distress—not to be confused with an acronym (see acronym vs. abbreviation for the ...

The distress signal CQD originated from the signal CQ, expressing "seeking you," or "all stations." The signal CQ was commonly used among wireless operators -- and land-based telegraphers before them ...