In Morse code, three dots and dash indicates the letter V, which during WWII symbolized "victory". So what's Morse code for "defeat"?
Three dots and a dash is the Morse code for V, which stood for victory. If you hadn’t guessed, a dash and two dots means D. (defeat)
Morse code was used as an international standard for maritime distress until 1999, when it was replaced by the Global Maritime Distress Safety System.
These days, Morse code is rarely used for communication, but it still works. It's not dependent on a medium, it's an idea--and a brilliant one at that - and is a system that was designed to be used by people, not machines. In that way it's different from the barcodes or 1s and 0s that power communications today. It's something we can learn and it will never really be obsolete.