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Copy of Barcodes and Barcode Scanners

What are barcodes, when were they invented, why, what types are there, what are they used for...where does the scanner come in?

ilteris oney

on 14 February 2013

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Transcript of Copy of Barcodes and Barcode Scanners

Barcodes & Barcode Scanners What is a Barcode? a way of encoding data using a combination of lines and spaces of varying widths It is a reference that a computer uses to look up an associated record that contains descriptive data and other important information Barcodes (cc) image by nuonsolarteam on Flickr What is a scanner? read or capture the barcode information and then sends it to the decoder usually in the computer classified as an input device meaning that it is used to put information (data) into a computer scanners (cc) image by nuonsolarteam on Flickr Life Before Barcodes & Scanners ... small ... small More Manual Labour or effort Push Cards First Developed for the 1890 US Census Desigined to speed up the purchasing process Expensive Introducing...The Barcode! A decade later, the barcode as we know it look its simplist form The orginial or prototype system used Ultro Violet Ink, but it faded easily and therefore, was not feasible and not economically viable BARCODES + SCANNER Wasn't until 1960s that barcodes were scanned with a laser (helium neon laser) At first, only a single laser was used to scan the barcode, but soon the addition of other lasers at separate angles were added to make the process more efficient and easier to use The Inventors! It is generally accepted that Joseph Woodland and Bernard Silver invented the first barcode on the 20th October 1949 The first barcode scanner was put into use in June 1974, manufactured by NCK co. It was installed at Marsh's Supermarket in Try, Ohio. On the 26th of June, 1974, the first product with a barcode was scanned at the checkout counter.

The first item was...
A 10 pack of wriggley's Fruit Gum
The technology of barcodes and barcode scanners both depend heavly on the developments in laser or light technology, as well as advancements in software. Types of Barcodes UPC Code 39 A varitation of UPC-a which allows for a more compact barcode by eliminating extra zeros to create an 8 digit code from a 12 digit UPC-A. The most common and well known bar code symbology. Doesn't contain a check digit, but is considered to be self-checking because single e error can't generate another valid character 128 Alphanumeric (sonsisting of or using both letters and numerals (cc) photo by theaucitron on Flickr (cc) photo by theaucitron on Flickr Used in:
Package Tracking
Inventory tracking
Mostly used by production inductries Code 128 Is a high density barcode symbology Used in:
wide world shipping and packing
Patient Bracelets
Inventory Control Capable of encoding 2 numbers into one character width (known as double density) which significantly reduces the amount of space the abrcode occupies
UPC-A UPC-E Found on books, magazines, newspapers Encodes 11 digits of numeric (0 to 9) message data along with a trailing check digit, for a total of 12 digits of bar code data Contains 4 sections:
1. Numer system
2. Manufacture code
3. Product Code
4. Check Digit Used for postal, retail, Inventory Control UPC-A UPC-A 1D 2D QR Code Usually stores addresses adn URL's which may appear in magazines, signs, on buses, business cards (cc) photo by theaucitron on Flickr - QR (quick response) -> Barcode allows itself to be decoded at high speeds Initially was used for tracking parts in vechicle manufacturing
Now used much more broadly in commercial tracking applications and convenience orientated applications aimed at mobile phone users. Types of Scanners Distinguished by their form factor (amount of operation manipulation required) and their scanning technologies Wand Scanners Must be wiped across the barcode at a constant rate and at a aprticular angle Least efficient, least expensive, small, durable, not limited by the width of teh barcode Fixed Mount Barcode Scanner reads the barcode as it is passed infront of the scanner Used on conveyer belts, now in supermarkets, security idenification and laboratories Linear Image Scanners More durable than laser scanners, but have a shorter reading distance. Ideal for reading damaged or poorly printed barcodes and reading barcodes under plastic film or covering Laser Barcode Scanners Most popular scanning technology today. Brightness and sharpness of laser scanners offer precisioness as long range or high density Omnidirectional Barcode Scanners Can read a barcode no matter hot it is orientated, speeds up the scanning process, reduces user fatigue Cost:
Wireless - $400
Wired - $100-$200
(price ranges according to density of light) Cost: $200 Cost: $560 to $900 Cost: $139
Cordless with High Density - $2,000

Price will vary for fixed, cordless and density Cost: $450 - $630
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