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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]
The history of communication itself can be traced back since the origin of speech circa 100,000 BCE. [1] The use of technology in communication may be considered since the first use of symbols about 30,000 years BCE. Among the symbols used, there are cave paintings, petroglyphs, pictograms and ideograms. Writing was a major innovation, as well ...
A public address system (or PA system) is an electronic system comprising microphones, amplifiers, loudspeakers, and related equipment. It increases the apparent volume (loudness) of a human voice, musical instrument, or other acoustic sound source or recorded sound or music.
Communication studies, also referred to as communication science, is the academic discipline studying communication. It is closely related to semiotics, with one difference being that communication studies focuses more on technical questions of how messages are sent, received, and processed.
Schramm's model of communication includes a feedback loop and the processes of encoding, decoding, and interpretation. Schramm's model of communication is an early and influential model of communication. It was first published by Wilbur Schramm in 1954 and includes innovations over previous models, such as the inclusion of a feedback loop and ...
The history of telecommunication began with the use of smoke signals and drums in Africa, Asia, and the Americas. In the 1790s, the first fixed semaphore systems emerged in Europe. However, it was not until the 1830s that electrical telecommunication systems started to appear. This article details the history of telecommunication and the ...
Mediated communication in the form of writing has a long history dating back to the invention of writing in Mesopotamia and Ancient Egypt. The development of the codex, a book-like medium for the production of written texts, extended the portability of mediated communication. In Euro-Asia this then led to the production of books and manuscripts ...
1930s–50s. The institutionalization of communication studies in U.S. higher education and research has often been traced to Columbia University, the University of Chicago, and the University of Illinois Urbana-Champaign, where early pioneers such as Paul F. Lazarsfeld, Harold Lasswell, and Wilbur Schramm worked.