A 1D or linear barcode is a combination of vertical bars. For some of them you can encode only numbers for other you can encode letters also. Most...

It is a combination of contrast marks that scanner can read and decode. For 1D barcode it is black and white vertical lines of different thickness....

It is usually letters and numbers. For some barcodes you can choose a specific set of characters(symbology). This information usually represents so...

It can be reasonably small. For example 1x1 cm for 2D barcode. But in the smaller barcode you can encode less information. And you also should use...

It is usual to be about 25 characters for 1D barcode and about 2000 for 2D one. Of course the more characters you encode the bigger is barcode. 1D...