Cde 5 Television ( TV ) is a telecommunication medium used for transmitting moving images in monochrome ( black and white ), or in colour, and in two or three dimensions and sound. The term can refer to a television set , a television program ("TV show"), or the medium of television transmission . Television is a mass medium for entertainment, education , news , politics, gossip and advertising. Television became available in crude experimental forms in the late 1920s, but it would still be several years before the new technology was marketed to consumers. After World War II , an improved form of black-and-white TV broadcasting became popular in the United States and Britain, and television sets became commonplace in homes, businesses, and institutions. During the 1950s, television was the primary medium for influencing public opinion . [1] In the mid-1960s, color broadcasting was ...
Instagram Instagram is a mobile , desktop , and Internet-based photo-sharing application and service that allows users to share pictures and videos either publicly, or privately to pre-approved followers. It was created by Kevin Systrom and Mike Krieger , and launched in October 2010 as a free mobile app exclusively for the iOS operating system . A version for Android devices was released two years later, in April 2012, followed by a feature-limited website interface in November 2012, and apps for Windows 10 Mobile and Windows 10 in April 2016 and October 2016 respectively. Instagram lets registered users upload photos or videos to the service. Users can apply various digital filters to their images, and add locations through geotags . They can add hashtags to their posts, linking the photos up to other content on...
Telephone A traditional landline telephone system, also known as plain old telephone service (POTS), commonly carries both control and audio signals on the same twisted pair ( C in diagram) of insulated wires, the telephone line. The control and signaling equipment consists of three components, the ringer, the hookswitch, and a dial. The ringer, or beeper, light or other device (A7), alerts the user to incoming calls. The hookswitch signals to the central office that the user has picked up the handset to either answer a call or initiate a call. A dial, if present, is used by the subscriber to transmit a telephone number to the central office when initiating a call. Until the 1960s dials used almost exclusively the rotary technology, which was replaced by dual-tone multi-frequency signaling (DTMF) with pushbutton telephones (A4). A major expense of wire-line telephone service is the outside wire pl...
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