What is a barcode

A barcode is a fast and more accurate way for computers to recognize alpha-numeric data. Computers can’t easily decipher the various shapes of printed letters and numbers, especially considering the large array of font types available. Instead, a barcode is a series of bars or blocks in varying sizes that represent numbers and letters. The data encoded in barcodes can be a part number, serial number, date code, shipping address, or just about any other type of information.

Barcode Symbologies

Barcodes are created using universally recognized code languages called barcode symbologies. They follow particular standards to ensure that the barcodes can be read by different barcode scanners in different locations around the world. A number of barcode trade associations were created to regulate the use and standards of barcode symbologies in specific industries.

Linear vs. 2D Barcodes

The main division in barcode symbologies is between linear, or 1D, barcodes and 2D barcodes. Linear barcodes are a series of vertical black lines and white spaces. It works like a license plate. The license plate itself does not hold any information about the vehicle or driver. Instead, the license plate number is used to access that information in the DMV’s database. A linear barcode is just a key to access specific information in a database.

2D barcodes are a pattern of blocks or circles that resemble the no-reception static on a TV. They are called “2D” because the barcode scanner must capture the entire width and length of the barcode, whereas they need to capture just the width of a linear barcode. 2D barcodes can hold up to 500 characters on average, so they can actually contain all the information without needing a separate database.