A is 978 or 979, which is a special prefix code assigned to books by ean international.
B is the team number, and China is 7.
C is the publishing house code, with 2-6 digits.
D is the serial number of the book, which is arranged by the publishing house in the order of publication.
E is the check code, 1 bit. Used to check whether the data is correct when the machine reads the bar code.
Question 2: What do the numbers in the bar code mean? What do the numbers in the bar code mean?
Take the barcode 69369838000 13 as an example.
The bar code is divided into four parts from left to right:
1-3 digits: * * 3 digits, corresponding to bar code 693, which is one of the national codes of China. (690-695 are all codes of China, which are allocated internationally).
4-8 digits: **5 digits, corresponding to the barcode of 69838, representing the manufacturer's code, which is applied by the manufacturer and allocated by the state.
9- 12 digits: * * 4 digits, corresponding to barcode 000 1, representing the commodity code in the factory, which is determined by the manufacturer.
13: * * *1,corresponding to 3 of the barcode, is a check code, which is calculated by the previous 12 bits according to a certain algorithm.
Formula 13 bit algorithm:
1: take out the sum of odd digits of this number, c1= 6+3+9+3+0+0 = 21;
2: Take out the sum of even numbers of this number, C2 = 9+6+8+8+0+1= 32;
3: The odd sum is added to "three times the even sum".
4. Unit number of results:117 (117%10 = 7);
5: subtract this single digit from 10:10-7 = 3;
6: Take the single digit of the obtained number (excluding the remainder of 10) 3%10 = 3;
Barcode or barcode is a graphic identifier that arranges several black bars and blanks with different widths according to certain coding rules to represent a group of information. Common bar codes are parallel lines composed of black bars (referred to as bars) and white bars (referred to as spaces) with great differences in reflectivity. Barcode can indicate the country of production, manufacturer, commodity name, production date, book classification number, starting and ending place, category and mailing date, so it has been widely used in many fields such as commodity circulation, book management, postal management, banking system and so on.
Question 3: Why are the bar codes of books different? What's the point? 20 points have character bar code and digital bar code. The bar code of each book is naturally different in different manufacturers or at different times.
Question 4: What's the difference between commodity bar code and book bar code? The commodity bar code adopts EAN- 13 code (EAN- 13 international commodity bar code) or EAN-8 code (EAN-8 international commodity bar code).
EAN- 13 barcode originated from Ouchuan, which is a kind of barcode developed on the basis of UPC-A barcode. It consists of enterprise identification code+product code+inspection code.
Use bar codes for books and publications.
The barcode on the book is also EAN- 13, which consists of 977/978/979+ISBN number. The full name of ISBN is "International Standard Book Number", with *** 10 digits. Composition of book barcode:
The top three are 978 or 979, representing books;
The 4th to 8th representative regions, such as 7, represent China publications, with the shortest number being 1 and the longest number being 5;
The 5th ~10 is the publishing house code, with a minimum of 2 digits and a maximum of 5 digits. The fewer digits, the bigger the publishing house.
6 ~ 12 is the book serial number, which is given by the publishing house, with the shortest 1 bit and the longest 6 digits;
13 bit is the check code, which is automatically calculated according to the first 12 bit.