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An electronic device for storing and processing data, typically in binary form, according to instructions given to it in a variable program
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A system for transmitting messages from a distance along a wire, especially one creating signals by making and breaking an electrical connection.
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Telephone was invented by alexander graham bella. Telephone is a system that converts acoustic vibrations to electrical signals in order to transmit sound, typically voices, over a distance using wire or radio
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The Internet is a global network connecting millions of computers. More than 100 countries are linked into exchanges of data, news and opinions. According to Internet World Stats, as of December 31, 2011 there was an estimated 2,267,233,742 Internet users worldwide
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messages distributed by electronic means from one computer user to one or more recipients via a network
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Skype is an Internet telephony service.Have a spoken conversation with (someone) over the Internet using the software application Skype, frequently also viewing by webcam
