Are you seeing a strange message on your iPhone that reads SOS? Here's what that message means, per Apple. Start the day ...

So what does "SOS" actually mean? Here's everything you need to know ... but it actually doesn't stand for anything. SOS is a Morse Code distress signal. Morse Code is a system that uses dots ...

Morse code is a communication system ... A well-known example is the international distress signal, SOS – three dots, three dashes, three dots. The code was initially transmitted as electrical ...

In short, it’s a life-saving device that emits an S.O.S. signal in Morse code over both the AM and FM bands. The device uses five 555 timers to get the job done, each of them dedicated to a ...