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  2. Videotelephony - Wikipedia

    en.wikipedia.org/wiki/Videotelephony

    Videotelephony, also known as videoconferencing and video teleconferencing, is the two-way or multipoint reception and transmission of audio and video signals by people in different locations for real time communication. A videophone is a telephone with a video camera and video display, capable of simultaneous video and audio communication.

  3. Internet of things - Wikipedia

    en.wikipedia.org/wiki/Internet_of_things

    The Internet of things ( IoT) describes physical objects (or groups of such objects) with sensors, processing ability, software, and other technologies that connect and exchange data with other devices and systems over the Internet or other communications networks. Internet of things has been considered a misnomer because devices do not need to ...

  4. SMS - Wikipedia

    en.wikipedia.org/wiki/SMS

    E.161, a common mobile keypad alphabet layout. SMS ( Short Message Service) is a text messaging service component of most telephone, Internet, and mobile device systems. It uses standardized communication protocols that let mobile devices exchange short text messages. An intermediary service can facilitate a text-to-voice conversion to be sent ...