SOS is the only Morse code I still remember. One of my early coding projects was a Morse code transcriber.
My old Nokia phone had a SMS ringtone that spelled out "SMS" in morse. It's quite similar to SOS, and now I don't know which is which
A proper SOS should be transmitted without breaks (and is therefore sometimes displayed as "SOS" with a bar on the top).
___
SOS (emergency call) = ...---...
SMS = ... -- ...
SOS (three letters) = ... --- ...Yeah I think my Nokia skipped the pauses, making it sound more similar to the proper SOS signal. But it only had the 2 long notes instead of three, obviously.
OSO? Maybe it was a Spanish flashlight warning of a bear nearby? ;)
This site is timely. Just the other day I turned on the emergency setting on my flashlight and thought oh that's an interesting pattern. Why would it flash three long then three short then three long? About 30 seconds later I realized that I had forgotten an entire alphabet.