Barcodes are classified according to their coding systems.
Edit： Click： Times Date：2026-4-7
Barcodes are classified according to their coding systems.
1.UPC Code
In 1973, the United States was the first to apply the UPC code in its domestic commercial system. Subsequently, Canada also adopted the UPC code in its commercial system. The UPC code is a fixed-length continuous numeric code system, with its character set consisting of the digits 0 to 9. It uses four element widths, and each bar or space is 1, 2, 3, or 4 times the unit element width. The UPC code has two types: UPC-A code and UPC-E code.
2. EAN Code
In 1977, the countries of the European Economic Community adopted the EAN code based on the UPC code standards. The EAN code is compatible with the UPC code and both have the same symbol system. The character numbering structure of the EAN code is the same as that of the UPC code, which is a fixed-length, continuous numeric code system. Its character set consists of the digits 0 to 9. It uses four element widths, with each bar or space being 1, 2, 3, or 4 times the unit element width. The EAN code has two types: EAN-13 code and EAN-8 code.
3. Cross 25 Code
The Cross 25 Code is a continuous type self-checking digital code system with variable length. Its character set consists of the digits 0 to 9. It uses two different element widths, with each bar and space being either a wide or narrow element. The number of encoded characters is an even number. All data in odd positions are encoded as bars, while data in even positions are encoded as spaces. If there are an odd number of data to be encoded, a 0 is added before the data to make the total number of digits even.
4. 39 size
39 size is the first alphanumeric code system. It was introduced by Intermec Company in 1974. It is a discrete self-checking alphanumeric code system with comparable lengths. Its character set consists of the digits 0-9, 26 capital letters, and 7 special characters (-, ., Space, /, %, ¥), totaling 43 characters. Each character is composed of 9 elements, including 5 bars (2 wide bars and 3 narrow bars) and 4 spaces (1 wide space and 3 narrow spaces). It is a discrete code.
5. Kudba Code
The Kudba Code (Code Bar) was introduced in 1972 and is a variable-length continuous self-checking digital code system. Its character set consists of the digits 0-9 and six special characters (-, :, /, ., +, ¥), totaling 16 characters. It is commonly used in warehouses, blood banks, and air express packages.
6. 128 Code
The 128 code was introduced in 1981 and is a variable-length continuous self-checking digital code system. It uses four element widths, each character consisting of 3 bars and 3 spaces, totaling 11 unit element widths, and is also known as (11, 3) code. It consists of 106 different bar code characters, each of which has three different character sets with different meanings, namely A, B, and C. By using these three alternating character sets, 128 ASCII codes can be encoded.
7. 93 size
93 size is a continuous alphanumeric code system with variable length. Its character set consists of numbers. 0-9, 26 capital letters, 7 special characters (-, ., Space, /, +, %, ¥), and 4 control characters. Each character is composed of 3 bars and 3 spaces, totaling 9 elements in width.
8. 49 Size
49 Size is a multi-line continuous, variable-length alphanumeric code system. It was introduced in 1987 and is mainly used as symbols on labels for small items. It adopts various element widths. Its character set consists of numbers 0-9, 26 capital letters, 7 special characters (-, ., Space, %, /, +, %, ¥), 3 function keys (F1, F2, F3), and 3 transformation characters, totaling 49 characters.
9. Other Code Systems
Apart from the above codes, there are other code systems as well. For instance, the 25 code was introduced in 1977 and was mainly used for labels of electronic components; the matrix 25 code is a variation of the 11 code; the Nixdorf code has been replaced by the EAN code; the Plessey code was introduced in May 1971 and was mainly used in libraries and other places.
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