Who invented Computer bar code system?
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(m)\n\nBar codes were invented by Bernard Silver and Norman Woodland in 1948. Their system used light to read a set of concentric circles, but they had to wait two decades before the advent of computers and lasers made their system practical. (However, the bar code system in use today is the Universal Product Code, introduced by IBM in 1973. The first bar coded item sold was a pack of gum in 1974.)
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A linear bar code is a binary code (1s and 0s). The lines and spaces are of varying thicknesses and printed in different combinations. To be scanned, there must be accurate printing and adequate contrast between the bars and spaces. Scanners employ various technologies to "read" codes. The two most common are lasers and cameras. Scanners may be fixed position, like most supermarket checkout scanners, or hand-held devices, often used for the taking of inventories. There should be (but typically is not,) a distinction drawn between the code, which is a structure for the conveyance of data, and the symbol, the machine-readable representation of the code. The code is text, which can be translated into a multiplicity of languages - English, French, Japanese, symbol.\n\nNotwithstanding its inauspicious beginning, the bar code has become a remarkable success, a workhorse in many and varied applications. One of the first successful bar codes, Code 39 developed by Dr. David Allais, is widely used in logistical and defense applications. Code 39 is still in use today, although it is less sophisticated than some of the newer bar codes. Code 128 and Interleaved 2 of 5 are other codes that attained some success in niche markets.
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It still does have two bars, apart from on keyboards - so I guess the answer could well be "when the computer revolution started". As for why, you'd have to ask the keyboard designers, but my guess is that they weren't English!
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John Vincent Atanasoff.\n\nIn 1939 Atanasoff recruited a graduate student to assist him with his computing project and was introduced to Clifford Berry, a gifted electrical engineer with a similar background to himself. A few months later, in December they presented the first prototype of the Atanasoff Berry Computer (ABC).\n\nAlthough the ABC utilized a mechanical clock system, the computing was electronic and for the first time in computing, vacuum tubes were used. Data was entered via punch cards and the ABC used two rotating drums containing capacitors to hold the electrical charge for the dynamic memory.
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C is designed by Dennis Ritchie and developed by Dennis Ritchie & Bell Labs\nC++ was designed and developed by Bjarne Stroustrup\nC# was designed and developed by Microsoft Corporation
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CENTURIES OF PROGRAMMING
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www.koders.com\n\nthese guys have all the code.from c,c++ to java..
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I think maybe the production company should be helping you with that. I found this site though... maybe it will help you.\nhttp://www.java4less.com/barcodes_dotnet.html
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I guess u mean who is thr discoverer of computers..well the Father of Computers is Charles Babbage.
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the first computer was made by an english man called charles babbage in the 1800s. it was like a calculater and was the size of a house. \nt
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http://en.wikipedia.org/wiki/Barcode
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1) The Telephone \nThe telephone is an instrument that converts voice and sound signals into electrical impulses for transmission by wire to a different location, where another telephone receives the electrical impulses and turns them back into recognizable sounds. In 1875, Alexander Graham Bell built the first telephone that transmitted electrically the human voice.\n2) The History of Computers\nThere are many major milestones in the history of computers, starting with 1936, when Konrad Zuse built the first freely programmable computer.\n3) Television \nIn 1884, Paul Nipkow sent images over wires using a rotating metal disk technology with 18 lines of resolution. Television then evolved along two paths, mechanical based on Nipkow's rotating disks, and electronic based on the cathode ray tube. American Charles Jenkins and Scotsman John Baird followed the mechanical model while Philo Farnsworth, working independently in San Francisco, and Russian émigré Vladimir Zworkin, working for Westinghouse and later RCA, advanced the electronic model.\n4) The Automobile\nIn 1769, the very first self-propelled road vehicle was invented by French mechanic, Nicolas Joseph Cugnot. However, it was a steam-powered model. In 1885, Karl Benz designed and built the world's first practical automobile to be powered by an internal-combustion engine. In 1885, Gottlieb Daimler took the internal combustion engine a step further and patented what is generally recognized as the prototype of the modern gas engine and later built the world's first four-wheeled motor vehicle.\n5) The Cotton Gin \nEli Whitney patented the cotton gin on March 14, 1794. The cotton gin is a machine that separates seeds, hulls and other unwanted materials from cotton after it has been picked.\n6) The Camera\nIn 1814, Joseph Nicéphore Niépce created the first photographic image with a camera obscura, however, the image required eight hours of light exposure and later faded. Louis-Jacques-Mandé Daguerre is considered the inventor of the first practical process of photography in 1837.\n7) The Steam Engine\nThomas Savery was an English military engineer and inventor who in 1698, patented the first crude steam engine. Thomas Newcomen invented the atmospheric steam engine in 1712. James Watt improved Newcomen's design and invented what is considered the first modern steam engine in 1765.\n8) The Sewing Machine\nThe first functional sewing machine was invented by the French tailor, Barthelemy Thimonnier, in 1830. In 1834, Walter Hunt built America's first (somewhat) successful sewing machine. Elias Howe patented the first lockstitch sewing machine in 1846. Isaac Singer invented the up-and-down motion mechanism. In 1857, James Gibbs patented the first chain-stitch single-thread sewing machine. Helen Augusta Blanchard patented the first zig-zag stitch machine in 1873.\n9) The Light Bulb\nContrary to popular belief, Thomas Alva Edison didn't "invent" the light bulb, but rather he improved upon a 50-year-old idea. In 1809, Humphry Davy, an English chemist, invented the first electric light. In 1878, Sir Joseph Wilson Swan, an English physicist, was the first person to invent a practical and longer-lasting electic lightbulb (13.5 hours) with a carbon fiber filament. In 1879, Thomas Alva Edison invented a carbon filament that burned for forty hours.\n10) Penicillin \nPenicillin was discovered by Alexander Fleming in 1928. Andrew Moyer patented the first method of industrial production of penicillin in 1948.
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Hello..Anyone from thr pals above are right about it. The PERSON WHO INVENTED COMPUTER FOR THE FIRST TIME . IT IS JOHN ATANASSOV. HE DIED ONLY A COUPLE OF YEARS AGO IN USA AND I HAVE THE PLEASURE TO KNOW ONE OF HIS GRANDCHILDREN!!
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There are lots of types of barcode, but the common one we all see all the time is called UPC, the Universal Product Code. \n\nEach digit is coded by two black and two white stripes. The stripes have widths of from 1 to 4 units, and the total width for each digit is always seven units.\n\nThis code is not quite all there is to it, however. Some digits of the barcode are reversed, so that they read right to left. Part of the code has black and white inverted, so black stripes are white and vice versa. This helps cut down errors and allows a computer to work out if the code was read from the wrong end when it was scanned.
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Here you go\nhttp://en.wikipedia.org/wiki/History_of_computing\n\n///
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The first computer program ever was a set of instructions punched into cards. \n\nThis kind of programming was used by Charles Babbage on his difference engines. The first reported program was written, or rather punched, by Babbages co-worker Ada Lovelace.\n\nThe first computers in the modern sense were constructed more than a century later by Konrad Zuse. They received their instructions by manually entering the first couple of bytes to initialize the processor and determine which hard-wired operations to perform.\n\nThese instructions were very basic boolean arithmetics - comparison of values, etc.
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Here is a link to everything you ever wanted to know about barcodes.