Telegraph

The telegraph is a communication system that uses electrical signals to send messages over long distances. Invented in the early 19th century, it allowed for quick transmission of information using a code, most famously Morse code, which consists of dots and dashes. Operators would tap out messages on a device, transmitting electrical pulses along wires. This revolutionized communication by enabling real-time updates and connections between distant places, transforming industries like journalism, business, and transportation, and laying the groundwork for future technologies, including the telephone and the internet.