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  2. Pager - Wikipedia

    en.wikipedia.org/wiki/Pager

    Pager. A pager, also known as a beeper or bleeper, [1] is a wireless telecommunications device that receives and displays alphanumeric or voice messages. One-way pagers can only receive messages, while response pagers and two-way pagers can also acknowledge, reply to, and originate messages using an internal transmitter. [2]

  3. Communications management - Wikipedia

    en.wikipedia.org/wiki/Communications_management

    Communications management is the systematic planning, implementing, monitoring, and revision of all the channels of communication within an organization and between organizations. It also includes the organization and dissemination of new communication directives connected with an organization, network, or communications technology.

  4. Media ecology - Wikipedia

    en.wikipedia.org/wiki/Media_ecology

    Media ecology. Media ecology theory is the study of media, technology, and communication and how they affect human environments. [1] The theoretical concepts were proposed by Marshall McLuhan in 1964, [2] while the term media ecology was first formally introduced by Neil Postman in 1968. [3]

  5. Distress signal - Wikipedia

    en.wikipedia.org/wiki/Distress_signal

    A distress signal, also known as a distress call, is an internationally recognized means for obtaining help. Distress signals are communicated by transmitting radio signals, displaying a visually observable item or illumination, or making a sound audible from a distance. A distress signal indicates that a person or group of people, watercraft ...

  6. Communication - Wikipedia

    en.wikipedia.org/wiki/Communication

    Communication is commonly defined as the transmission of information. Its precise definition is disputed and there are disagreements about whether unintentional or failed transmissions are included and whether communication not only transmits meaning but also creates it.

  7. Push-to-talk - Wikipedia

    en.wikipedia.org/wiki/Push-to-talk

    Push-to-talk over cellular ( PTToC) is a service option for a cellular phone network that enables subscribers to use their phones as walkie-talkies with unlimited range. A typical push-to-talk connection connects almost instantly. A significant advantage of PTT is the ability for a single person to reach an active talk group with a single ...

  8. 2-meter band - Wikipedia

    en.wikipedia.org/wiki/2-meter_band

    2-meter band. The 2-meter amateur radio band is a portion of the VHF radio spectrum that comprises frequencies stretching from 144 MHz to 148 MHz [1] in International Telecommunication Union region (ITU) Regions 2 (North and South America plus Hawaii) and 3 (Asia and Oceania) [2] [3] and from 144 MHz to 146 MHz in ITU Region 1 (Europe, Africa ...

  9. Mass media in South Korea - Wikipedia

    en.wikipedia.org/wiki/Mass_media_in_South_Korea

    Mass media in South Korea. South Korea's MBC Ilsan Dream Center in Ilsan. The South Korean mass media consist of several different types of public communication of news: television, radio, cinema, newspapers, magazines, and Internet -based websites . Modern Korean journalism began after the opening of Korea in the late 19th century.