I have a library system project and I'd like to ask if there is a standard bar code device for all books (new and old ones). thanks for any helpful answers.
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If you mean to read the ISBN, they use an EAN-13 barcode.
Most 1D barcode readers would work with this. (1D referring to the barcode having only 1 dimension, usually data plotted along the X axis. 2D Barcodes include Data Matrix and QR Code, where the data is plotted along both the X and Y axis).
Barcode scanners now are typically USB and input data as if they were a standard keyboard. You can also get scanners which work over TCP/IP, and likely other technologies such as Bluetooth. When you look for devices, check the barcode types it covers, as stated most all of them will support EAN-13. You don't need a 2D barcode reader, these are usually imaging devices and can cost significantly more, as well as having a higher latency (Not that this should matter unless you are dealing with very high volumes, very quickly).
Jonno
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