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There are many
types of barcodes, but the most commonly used ones are the
following:
EAN-13 code:
Product barcode, universally applicable, supports 0-9 numbers,
13 digits in length, and grooved.
UPC-A code:
Product barcode, mainly used in the United States and Canada,
supports numbers 0-9, is 12 digits in length, and has grooves.
Code-128 code:
Universal barcode, supports numbers, letters and symbols,
variable length, no grooves.
QR code:
two-dimensional code, supports multiple character sets and
encoding formats, has variable length, and has positioning
marks. |
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There are many
types of barcodes because they have different uses and
characteristics.
For example:
UPC (Universal
Product Code) is a barcode used to label retail products,
and it can be found in nearly every merchandise and grocery
store in the United States.
CODE 39 is a
barcode that can encode numbers, letters and some special
characters. It is often used in manufacturing, military and
medical fields.
ITF (Interleaved
Two-Five-Five) is a barcode that can only encode an even
number of digits, and it is often used in the field of logistics
and transportation.
NW-7 (also known
as CODABAR) is a barcode that can encode numbers and four
start/stop characters. It is often used in libraries, express
delivery and banks.
CODE 128 is a
barcode that can encode all 128 ASCII characters, and it is
commonly used in areas such as package tracking, e-commerce, and
warehouse management. |