What are the different forms of electronic media?
Answers
Radio
Television
Telephone
RADIO
Radio is an effective means of broadcasting information to many people at once. For this reason, radio is a form of mass communication. The mass media also include newspapers, popular magazines, and television. Radio and other forms of mass communication do not allow for convenient, prompt feedback. Receivers who wish to provide feedback on a particular message typically need to use some other communication channel—telephone, email, or letter—to respond to a sender. The most common business use of radio is for advertising, primarily at the local level. It could be used for debate on selected problems, and for dissemination of information through talks, folk songs, dramas etc.
Television
Television, another of the mass media, is also an effective means of broadcasting information to many people at once. In addition to using commercial television for advertising, business has been making increasing use of TV for education and training programs and videoconferencing. Because it combines auditory and visual images, TV provides a fairly effective substitute for face-to-face communication when time, distance, or cost of travel would make face-to-face communication difficult.
Telephone
The telephone was the first electronic channel to gain wide acceptance for business use. Telephones are everywhere—at least in the industrialized world. Most people raised in industrialized countries are familiar with the telephone and feel comfortable sending and receiving calls. Because they are so ubiquitous, people in industrialized countries have a difficult time comprehending that more than half the world’s population has never placed a telephone call.
The telephone offers many advantages. It is often the fastest, most convenient means of communicating with someone. The telephone is also economical in comparison with the cost of writing and sending a letter or the travel involved in face-to-face meetings. Although standard telephone equipment limits sender and receiver to exchanging vocal information, tone of voice, rate of speech, and other vocal qualities help sender and receiver understand each other’s messages.
Transmission
Wire and transmission lines
Telegraph 1795–1832
Facsimile 1843–1861
Telephone 1849–1877
Coaxial cable 1880
Fiber Optics 1956–1970
Wireless
Radio 1897–1920
Satellite 1958–1972
Free Space Optics 1960s
Internet
Downloading 1969 (first protocols for transferring files)
Live Streaming 1996 (RTP protocol)
Display and output
Information Processing 1940s (Term)
Galvanometer 18
Telegraph Sounder 1844
Telephone Receiver 1849–1877
Light red 1801–1883
Neon 1893–1902
Teleprinter 1910
CRT 1922
Radio/television tuner 1894–1927
Speaker/Headphones 1876–1928/1930s
LED/LCD 1955–1962/1968
Laser light show 1970s
Computer Monitor 1950s/1976 (for PCs)
Large Electronic Display 1985
HDTV 1936 (Term) 1990s (Standards)
HMD 1968–current
Electrical Signal Processing
Capture 1745 (Capacitor)
Analog methods of Encoding 1830s (Morse code)
Electronic Modulating 1832–1927
Electronic Multiplexing 1853 (TDM)
Digitizing 1903 (PCM telephone)
Electronic encryption 1935–1945
Online routing 1969
Electronic programming 1943–current
Electronic information storage
Recording medium
Punched card and paper tape 1725/1846
Phonograph cylinder and disk 1857–1958
Film 1876–1889
Magnetic storage 1898–2003
RAM 1941–current
Barcodes 1952/1973 (UPC)
Laser Disc 1969–1978
Compact Disc/DVD 1982/1993–current
Content formats
Content (media) 1877–current
Audio recording 1877–current
Video recording 1952–current
Digital file formats
Database content and formats 1963–current
Interactivity
Control panel
Input device
Game controller
Handheld
Wired glove
Brain–computer interface (BCI)...