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Digital TV can support more than one program in the same channel bandwidth. [131] It is an innovative service that represents the first significant evolution in television technology since color television in the 1950s. [132] Digital TV's roots have been tied very closely to the availability of inexpensive, high-performance computers.
Vladimir Kosma Zworykin [b] (1888/1889 [a] – July 29, 1982 [7]) was a Russian-American inventor, engineer, and pioneer of television technology. Zworykin invented a television transmitting and receiving system employing cathode-ray tubes.
The earliest CRTs were monochrome and were used primarily in oscilloscopes and black and white televisions. The first commercial colour CRT was produced in 1954. CRTs were the single most popular display technology used in television sets and computer monitors for over half a century; it was not until the 2000s that LCDs began to gradually ...
Digital video equipment in an edit suite. There are now several kinds of video displays used in modern TV sets: CRT (cathode-ray tube): Up until the first decade of the 21st century, the most common screens were direct-view CRTs for up to roughly 100 cm (40 inch) (in 4:3 ratio) and 115 cm (45 inch) (in 16:9 ratio) diagonals.
Plain Old Telephone Service (POTS), or Plain Ordinary Telephone System, [1] is a retronym for voice-grade telephone service that employs analog signal transmission over copper loops. The term POTS originally stood for Post Office Telephone Service , as early telephone lines in many regions were operated directly by local Post Offices .
[1] They also invented an automatic flute player which appears to have been the first programmable machine. [2] c. 1000 Abū Rayhān al-Bīrūnī invented the Planisphere, an analog computer. [3] He also invented the first mechanical lunisolar calendar which employed a gear train and eight gear-wheels. [4]
This machine invented the principle of the modern computer and was the birthplace of the stored program concept that almost all modern day computers use. [52] These hypothetical machines were designed to formally determine, mathematically, what can be computed, taking into account limitations on computing ability.
The A-0 high-level compiler is invented by Grace Murray Hopper. April 1952: US IBM introduces the IBM 701, the first computer in its 700 and 7000 series of large scale machines with varied scientific and commercial architectures, but common electronics and peripherals. Some computers in this series remained in service until the 1980s.