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It was invented by Charles Babbage, they used vacuum tubes for circuits and magnetic drums for memory and occupied four whole. -
It was invented by Samuel Finley Breese , and it works by means of the emission and reception of electrical signals, the system proposed by the telegraph is based on the transmission of text messages. -
It was invented by Guglielmo Marconi, The transmitter registers the information it wants to transmit (such as the speaker's voice or a song) in the form of an electrical signal. -
It was invented by Alexander Graham Bell, works with a membrane vibrated with the voice, touching a piece of iron. -
It was invented by John Logie Baird, The television tube transforms the electrical signal it receives into the image you see on the screen. -
It was invented by Alan Kay, a very limited piece of equipment that allowed you to write directly on your screen using a stylus. -
It was invented by Martin Cooper, this is a form of electromagnetic energy that lies between FM radio waves and microwaves.