Over the years, the transmission of signals has become more and more powerful. The earliest way to send a message without personally delivering it was to give a signal that could be seen from a way. Some early examples include fire signal, smoke signal and flag waving. In the 1830’s, Samuel Morse invented the telegraph, which sent electrical signals along a wire. People sent messages in a code of long and short beeps, called Morse Codes. In 1901, the first radio message was sent across the Atlantic by an Italian inventor, Guglielmo Marconi. He proved that it is possible to communicate with electrical signals. Today, messages can be turned into light pulses as well as electrical signals. Tiny glass tubes called optical fibers carry light pulses. Today, fiber optic technology uses light to carry sound signals, farther, faster and more efficiently.