Definition
Radiotelegraphy is the process or system of transmitting telegraphic messages by radio waves. It's the art and science of sending Morse code wirelessly. Think of it as the precursor to modern texting, but with more clicks and beeps! It involves encoding messages into electrical signals, transmitting them wirelessly, and then decoding them at the receiving end. Radiotelegraphy was a critical technology for maritime and military communication before the advent of voice radio. Nowadays, it's mostly a historical curiosity.