-
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. -
Computer - Sir William Thomson
An electronic device for storing and processing data, typically in binary form, according to instructions given to it in a variable program. -
Telephone - Alexander Graham Bell
A system for transmitting voices over a distance using wire or radio, by converting acoustic vibrations to electrical signals. -
Radio - Guglielmo Marconi
The transmission and reception of electromagnetic waves of radio frequency, especially those carrying sound messages. -
Television - Philo Farnsworth
A system for converting visual images (with sound) into electrical signals, transmitting them by radio or other means, and displaying them electronically on a screen. -
Tablet - Alan Kay
A small portable computer that accepts input directly on to its screen rather than via a keyboard or mouse. -
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.
