Which form of communication was the first to hold significance for military and commercial use through radio?

Radiotelegraphy holds significance as the first form of communication that was widely adopted for military and commercial use through radio. This method, which involves transmitting information via Morse code using radio waves, emerged as a critical technology in the late 19th and early 20th centuries. It enabled ships, aircraft, and military units to communicate over long distances without the need for physical connections like wires, which was especially valuable in situations where conventional means of communication were impractical or impossible.

The development of radiotelegraphy revolutionized communication by providing real-time connectivity, which was essential for navigation, emergency situations, and tactical operations. Its implementation paved the way for other forms of radio communication, including telephony, microwave transmission, and satellite communication, but it was radiotelegraphy that initially laid the groundwork for these advancements in both military and commercial industries.