Scanning Basics: From Laser to Imager Whether you're aware of it or not, barcodes are one of the most influential technologies of the 20th century. The simple black and white bars you find on every product have helped usher in a level of efficiency that has allowed for large scale tracking around the globe. Many businesses would not be possible to run without the humble barcode. Keeping track of anything accurately is almost unimaginable without barcodes. How exactly do they work though? To best understand the differences imagers bring to the table we should first know how they work. Couponing