Your question is a bit too broad for a specific answer, but if you are
asking if barcode scanners can be used with Access, they, yes, they can... I
use barcodes and a scanner in a school library application written in
Access. It is the "wedge" type of scanner which sends the scanned number to
the application as if it had been typed in at the keyboard. You can find
more information about scanners and barcodes and Access and oodles of other
things at Tony Toews's site and particularly here: