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TELEGRAPH - David Alter
A system for transmitting messages from a distance along a wire, especially one creating signals by making and breaking an electrical connection. -
TELEPHONE - Alexander Graham Bell
A system for transmitting voices over a distance using wire or radio, by converting acoustic vibrations to electrical signals. -
TABLET - Alan Kay
A flat slab of stone, clay, or wood, used especially for an inscription. -
TELEVISIÓN - John Logie Baird
Television is a system of transmission of images and sound at a distance through Hertz waves. -
RADIO - Nikola Tesla
Radio is a means of communication that is based on the sending of audio signals through waves. -
COMPUTER - Konrad Zuse
An electronic device for storing and processing data, typically in binary form, according to instructions given to it in a variable program. -
MOBILE PHONE - Martin Cooper
A telephone with access to a cellular radio system so it can be used over a wide area, without a physical connection to a network.
