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Home - bar code
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Applications of Barcodes:
Barcodes and RFID (Radio frequency Identification) are used when items
have to be
labeled with information, which are to be processed by computers.
No longer does
the data have to be manually typed into a terminal, the operator simply
has to display
the code to a barcode reader and the information is entered
automatically. In fully
automated environments, such as baggage routing at airports barcodes
contain the
destination and passenger information.
With each application, the data contained in the barcode varies. A
simple example
of this would be an identification number, which is used to index a
database where
the complete information is kept. The EAN-13 and UPC codes work in
this manner.
The more completed barcode contains the complete information; therefore,
there is
no need for an external database. This led to the development of
barcode symbologies,
which are equivalent to a language. The limited space of simple
barcodes and the
push to encode more information led to the development of matrix codes
or true 2D
barcodes. These consist of a grid of square cells rather than
bars. A compromise
between true 2D barcodes and linear barcodes are the stacked barcodes.
These are
created by taking a traditional linear symbology, and then placing it in
an envelope,
which permits multiple rows.
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