ISO, UPC and GS1 are the abbreviations of what?

Barcodes
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A barcode is an optical, machine-readable, representation of data; the data usually describes something about the object that carries the barcode. Initially, barcodes were only scanned by special optical scanners called barcode readers. Later application software became available for devices that could read images, such as smartphones with cameras.
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Very interesting!
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flagGermany
57%
11%
13%
17%
45
flagGreece
57%
21%
7%
14%
14
flagIndia
37%
20%
12%
25%
24
flagAustria
37%
12%
18%
31%
16
flagthe United Kingdom
35%
30%
25%
10%
20
flagAustralia
33%
16%
16%
33%
12
flagPakistan
33%
25%
33%
8%
12
flagPoland
29%
39%
17%
12%
930