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Type “history of the telegraph” into a search engine and the results will point you to Samuel F. B. Morse. History largely credits him with the invention of both the electromagnetic telegraph and Morse code, which enabled people to send instant messages across long distances. With Morse’s successful test of the electromagnetic telegraph on May 24, 1844, the potential for worldwide communication changed forever. The message he sent, “What Hath God Wrought?” traveled via his electromagnetic telegraph from Washington, DC to Baltimore, MD.

The code, initially employed in 1844, earned various monikers, including Morse landline code, American Morse code, and Railroad Morse, serving as the backbone of railroad telegraphy in the United States until the 1970s.

It's worth noting that in the United States, the last commercial Morse code transmission occurred on July 12, 1999, marking a poignant end to an era. This final transmission was a poignant nod to history, concluding with the very message Samuel Morse himself sent in 1844, "what hath god wrought," followed by the prosign "sk," signifying the end of contact. This symbolic moment paid homage to the profound impact Morse code had on communication over the decades.

"What Hath God Wrought?" in American Morse Code