-
Telegraph Samuel Morse
The telegraph revolutionized long-distance communication. It worked by transmitting electrical signals over a wire laid between stations -
Telephone Alexander Graham Bell
A telephone converts sound, typically and most efficiently the human voice, into electronic signals that are transmitted via cables -
Radio Guillermo Marconi
A radio is used to convey information from one place to another through the intervening media. -
Television Philo Farnsworth
A television is a system for transmitting visual images and sound that are reproduced on screens. -
Computer Charles Babbage
The function of a computer is taking data and instructions from a user, processing the data as per instructions, and displaying or storing the processed data. -
Tablet Alan Kay
Tablets can be used to browse the Internet, check email, download and read books, play games, watch videos, organize content, and much more -
Mobile phone Martin Cooper
The primary function of a mobile phone is voice communication, mobile phones allow one user to call another and talk from afar.