This is GNU-barcode. The package is meant to solve most needs in
barcode creation with a conventional printer. It can create printouts
for the conventional product tagging standards: UPC-A, UPC-E, EAN-13,
-EAN-8, ISBN, as well as a few other formats. Ouput is generated as
+EAN-8, ISBN, as well as a few other formats. Output is generated as
either Postscript or Encapsulated Postscript (other back-ends may be
added if needed).