Barcodes

Presumably you're talking about a site where you can sell your old CD's. In which case 'Music Magpie' is one possibility. You type your bar-code, and it tells you what they think your CD is worth - See related link.

A barcode is an optical machine-readable representation of data relating to the object to which it is attached. Originally barcodes systematically represented data by varying the widths and spacings of parallel lines, and may be referred to as linear or one-dimensional (1D). Later they evolved into rectangles, dots, hexagons and other geometric patterns in two dimensions (2D). Although 2D systems use a variety of symbols, they are generally referred to as barcodes as well. Barcodes originally were scanned by special optical scanners called barcode readers. Later, scanners and interpretive software became available on devices including desktop printers and smartphones. The first step toward today's bar codes came in 1948, when Bernard Silver, a graduate student, overheard a conversation in the halls of Philadelphia's Drexel Institute of Technology. The president of a food chain was pleading with one of the deans to undertake research on capturing product information automatically at checkout. In 1951 Woodland got a job at IBM, where he hoped his scheme would flourish. The following year he and Silver set out to build the first actual bar code reader - in the living room of Woodland's house in Binghamton, New York. The device was the size of a desk and had to be wrapped in black oilcloth to keep out ambient light. It relied on two key elements: a five-hundred-watt incandescent bulb as the light source and an RCA935 photo-multiplier tube, designed for movie sound systems, as the reader.

Woodland hooked the 935 tube up to an oscilloscope. Then he moved a piece of paper marked with lines across a thin beam emanating from the light source. The reflected beam was aimed at the tube. At one point the heat from the powerful bulb set the paper smoldering. Nonetheless, Woodland got what he wanted. As the paper moved, the signal on the oscilloscope jumped. He and Silver had created a device that could electronically read printed material.

Having a barcode tattoo on the neck means that you are a product of the society. Being a product of the society does in turn mean that today's society has formed you as a person and made you to what you are today.

only if it smudges or the lines vertically and damaged. Bar-code are very resilient as they are used in frozen and chilled product sales.

Best possible result that worked wonders for me is if you have a printer/scanner, scan them on to your computer. Bring them up on the computer and scan them from there. And/or if you would like as well is, bring the barcodes up in print preview, see how they will turn out on paper, preferably "blown up" meaning bigger than their original size, and then print them out, and then put them under some really good lighting, and then scan them that way as well. If you don't always want to bother with scanning them from your computer. It did for me, good luck!

a 3d barcode is digital.we can tell this because it uses binary (a code which only uses two didgit's 1 and 0).a blank or white space means 0 and a black space means 1.this proves that a 3d barcode is digital not anolouge.

It depends on your character of service, the drug use code might get you some weird looks when you apply for benefits, you wont be allow back into the military unless there is a waiver, do some research based of your DD214..

If you understand that a barcode is a very short description of where something was made, who made it, what it is, what size it is, what colour it is then you would understand why barcodes are recognised in many different countries in the world.

depending on what "HOW MANY" means ...

how many digits in one barcode or

how many combinations can there be...

^^ specify pls.

See related link for a web-site

at this website:barcode.com/up/

To signal that it it has analyzed the barcode

Monitor

It's a PDF417 barcode.

it calculates the checkdigit based on the number read. if the check digit calculated matches with the one read then barcodes has been read correctly.

Red Laser, and it's only for iPhone because it requires the camera.