Telegraphy

Discovered by: Pavel Schilling built the first electrical telegraph. Samuel Morse contributed to the invention of a single-wire telegraph system based on European telegraphs. He was a co-developer of Morse code and helped to develop the commercial use of telegraphy.

What is it? The long-distance transmission of textual messages where the sender uses symbolic codes, known to the recipient, rather than a physical exchange of an object bearing the message.

Why is it important? The telegraph freed communication from the time constraints of postal mail and revolutionized the global economy and society. [Image - Public Domain https://commons.wikimedia.org/w/index.php?curid=402251]