Print4Sure OCR Barcode module interface cards/adapter

OCR Barcode module This solution is based on a OCR-B SIMM, DIMM, or MFC module, which is inserted in your HP LaserJet printer like a memory expansion. The advantage of this is that the OCR-B font is always available, even though the printer has been turned off.

Which one of the two types of memory modules you should use depends on your specific printer model.