"S.O.S" is a distress signal that is internationally recognized as a call for help in emergency situations. The letters S.O.S. do not stand for any specific words. Instead, they are chosen because the combination of three dots, followed by three dashes, and then three more dots is easy to recognize and understand in Morse code, which is a system of communication using short and long signals (dots and dashes). The S.O.S signal is often used in situations where immediate help is needed, such as when someone is stranded or in danger.