Barcode

Barcode is a method of representing data in a visual, machine-readable form. Initially, barcodes represented data by varying the widths and spacings of parallel lines. These barcodes, now commonly referred to as linear or one-dimensional (1D), can be scanned by special optical scanners, called barcode readers.

History

The concept of the barcode originated in the 1940s as a means of tracking the movement of railroad cars. The first patent for a barcode type product (US Patent #2,612,994) was issued to inventors Joseph Woodland and Bernard Silver on October 7, 1952.

Types of Barcodes

There are two types of barcodes: linear – or 1D, and 2D. Most people are familiar with the linear, or 1D barcodes that appear on everything from food items to concert tickets. These barcodes represent data with varying widths and spacings between parallel lines.

2D barcodes are a bit more complex. They use rectangles, dots, hexagons, and other geometric patterns to represent data. QR codes, a type of 2D barcode, have become particularly popular due to their ability to be scanned with a smartphone.

Uses

Barcodes are used in various fields, including retail, warehousing, and healthcare. In healthcare, barcodes can be used to identify patients, track medication, and ensure patient safety. In retail, they are used for inventory management and pricing. In warehousing, barcodes are used to track inventory levels and locations.

Barcode Scanners

A barcode scanner is an electronic device that can read and output printed barcodes to a computer. It consists of a light source, a lens and a light sensor translating optical impulses into electrical ones.

Barcode in Healthcare

In the healthcare sector, barcodes play a crucial role in ensuring patient safety and improving efficiency. They are used in patient identification, medication management, and specimen collection, among other things.

See Also

• QR Code
• RFID
• Optical Character Recognition