Label & Barcode Printing Labels Printer Consumables Barcode Scanning Additional ProductsGlossary O
Browse through our glossary to find out definitions for bar coding and RFID terms.
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| Glossary Term | Definition |
| OCR-A | An abbreviation commonly applied to the character set contained in ANSI Standard X3.17-1981. A stylized font choice used for traditional OCR printing. |
| OCR | Optical character recognition. |
| ODBC | Open Database Connectivity A standard that allows front-end GUI development languages such as Visual Basic to access server databases. |
| ODETTE LABEL | The European equivalent of AIAG. See AIAG for further details. |
| OMNIDIRECTIONAL | Bar codes which can be read in any orientation in relation to the scanner. |
| ON-DEMAND | A term used to describe when labels are printed immediately when the customer needs them and are ready for use, versus being sent off-site for printing. |
| ONE DIMENSIONAL BAR CODE | A complete bar code message is expressed in a single line of bars. Also commonly referred to as a linear barcode. |
| OPACITY | The property of a substrate material that minimizes show-through from the back or the next sheet. The ratio of the reflectance with a black backing to the reflectance with a white backing. Ink opacity is the property of an ink that prevents the substrate from showing through. |
| OPERATING TEMPERATURE | Denotes the prescribed temperature range for the safe operation of a thermal printer. |
| OPTICAL THROW | The distance from the scanner face to the closest point at which symbol can be read; also, optical throw is the difference between range and depth of field. |
| ORIENTATION | The alignment of a bar code symbol with respect to horizontal. Two possible orientations are horizontal and vertical bars and spaces (picket fence formation), and vertical with horizontal bars and stripes (ladder formation). |
| OVERHEAD | The fixed number of characters required for start, stop, and checking in a given bar code symbol—a symbol requiring a start and stop character and two check characters contains four characters of overhead. To encode three characters with the overhead listed, seven characters are required to print. |