part of POS system are bar code readers. Their basic role
is decoding a picture (bar code) into a line of numbers,
which can be analyzed as data in applied software. In retail
markets they work as fast data searchers, what speeds up
serving buyers, shorter standing at the cash register and
producer technologies (Wand, CCD, laser) bar code readers
can be divided, by purpose into:
handy bar code readers can be used when
there's no need for frequent use (warehouses, retail markets
etc.) because of their construction (one line reading, movable
parts-cable, falls etc.).
bar code scanners are used in retail markets with
large number of buyers (supermarkets, mega markets etc.).
bar code readers have wide range of use in industry,
outdoor work, especially in hard conditions like rain, reading
bar codes from distance or resistance to mechanical hits.