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EAN BAR CODE SYMBOLS  
The article number is represented by a machinereadable symbol, printed to welldefined specifications.  
Article numbers for consumer units are always represented by standard EAN13 symbols  for 13 digit numbers and EAN8 for 8digit number.  
The bar code consists of a series of light and dark vertical parallel "bars" and is normally incorporated as part of the original packaging design. There are, however, alternative methods of applying the symbol such as adhesive label, swing tickets, header cards, etc.  
(1) COUNTRY PREFIX  
The first 3digits identify the nationality of the organisation issuing the bar code. "489" is the prefix of Hong Kong.  
¡@ (2) MANUFACTURER OF PRODUCT 

This 4dight is the code of the manufacturer is known as the Manufacturer Number.  
¡@ (3) SPECIFIC PRODUCT ITEM 

This 5dight item number is allocated by the manufacturer to each of its specific product.  
¡@ (4) CHECK DIGHT 

The last digit serves as an accuracy check on the entire number by scanning devices.  
¡@ CHECK DIGIT CALCULATION: 

The last digit is an all important "fail safe" for accuracy of scanning. The check digit is derived by a modulo1O calculation from all the other digits in the number, via the following procedure.  
STEP ONE:  Starting with the second digit in the number, add up all the alternate digit values  EXCLUDING THE CHECK DIGIT  from left to right. 
STEP TWO:  Multiply the above total, of Step One, by 3. 
STEP THREE:  Total the remaining, unadded, digit values. 
STEP FOUR:  Add the result of Step 2 to the result of Step 3. 
STEP FIVE:  The modulo1O check digit, therefore, is the smallest number, which, when added to the result of Step 4, produces a multiple of 1O 
The following example calculates the check digit number for 489 1234 56789? .....
STEP ONE: 8 + 1 + 3 + 5 + 7 + 9 = 34 STEP TWO: 34 x 3 = 102 STEP THREE: 4 + 9 + 2 + 4 + 6 + 8 = 33 STEP FOUR: 102 + 33 = 135 STEP FIVE: 135 + ? = 140 
The check digit number, therefore, is 5 and the complete number
is 489 1234 56789 5


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