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Telegraph/ David Alter
A telegraph is a system for transmitting messages from a distance along a wire, especially one creating signals by making and breaking an electrical connection. A telegraph works by transmitting electrical signals over wires. A telegraph has both a transmitter and a receiver. The transmitter is the telegraph or transmission key. Wires connect the transmitter and receiver. Created by David Alter in 1836. -
Telephone/ Alexander Graham Bell
A telephone is a system for transmitting voices over a distance using wire or radio, by converting acoustic vibrations to electrical signals. An example of a telephone is a network or system that transmits electrical signals so you can call someone in Japan from your home in New york. It was created by Alexander Graham Bell in 1876. -
Computer/ Charles Babbage
A computer is an electronic device for storing and processing data, typically in binary form, according to instructions given to it in a variable program. It has the ability to store, retrieve, and process data. You may already know that you can use a computer to type documents, send email, play games, and browse the Web. Invented by Charles Babbage on 1883. -
Radio/ Guillermo Marconi
Radio works by transmitting and receiving electromagnetic waves. The radio signal is an electronic current moving back and forth very quickly. A transmitter radiates this field outward via an antenna; a receiver then picks up the field and translates it to the sounds heard through the radio. Invented by Guillermo Marconi in 1890. -
Television/ John Logie Baird
Telegram television (also known as a TV) is a machine with a screen. Televisions receive broadcasting signals and change them into pictures and sound. The word "television" comes from the words tele (Greek for far away) and vision (sight). ... Newer TVs are much lighter and flatter. Created by John Logie Baird in 1925 -
Mobile phone/ Eric Tigerstedt
A mobile phone is 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. 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. Some people carry more than one mobile phone for different purposes, such as for business and personal use. Invented by Eric Tigerstedt on 1973 -
Tablet/ Alan Kay
Tablet computers resemble smartphones in some ways and can also be used to take photos, make phone calls, send messages, record videos and perform other tasks that can be performed by a smartphone as well. Most tablets are touch operated and are between the size of a smartphone and a laptop. Invented by Alan Key on 2001