-
telegraph-Pável Dúrov
It worked by transmitting electrical signals over a wire laid between stations. -
telephone-Alexander Graham Bell
A telephone is an instrument designed for the simultaneous transmission and reception of the human voice. -
radio-Guglielmo Marconi
The prime purpose of radio is to convey information from one place to another through the intervening media. -
television-Philo Farnsworth
Television, sometimes shortened to TV or telly, is a telecommunication medium used for transmitting moving images in monochrome. -
computer-Charles Babbage
Computers are used to control large and small machines which in the past were controlled by humans. -
mobile phone-John F. Mitchell and Martin Cooper
Mobile phones are used for a variety of purposes, such as keeping in touch with family members, for conducting business, and in order to have access to a telephone in the event of an emergency. -
tablet-Jeff Hawkins
Tablets are simple and convenient to use. They provide an accurately measured dosage of the active ingredient in a convenient portable package, and can be designed to protect unstable medications or disguise unpalatable ingredients.
