What Is a Barcode?
Overview: A barcode is a simple way to store information using lines or patterns that a scanner can read quickly. Used in stores, warehouses, and hospitals, barcodes help track products, speed up checkout, and reduce mistakes. There are two main types: 1D barcodes like UPC and EAN, and 2D barcodes like QR codes and Data Matrix, each designed for different uses. First invented in the 1940s and widely adopted in the 1970s, barcodes have become essential for fast, accurate, and automated systems. With barcode verification, businesses make sure their codes meet ISO and GS1 standards, so every scan works as it should. Intermax offers expert support, hardware, and barcode verification to help you stay compliant and efficient.
Understanding the Lines That Changed Global Commerce
Barcodes are everywhere—from supermarket shelves to hospital wristbands. But what are they, exactly? In this blog, we’ll break down what a barcode is, how it came to be, and what types of barcodes are used today to power supply chains, inventory systems, and point-of-sale operations around the world.
What Is a Barcode?
A barcode is a visual, machine-readable representation of data. At its core, a barcode is used to encode information such as a product identifier, which can then be scanned by a barcode reader. This simple mechanism enables instant access to data, making tasks like inventory tracking, order picking, and checkout faster and more accurate.
Barcodes are a cornerstone of automation and efficiency in retail, logistics, healthcare, manufacturing, and more. With just a scan, you can link a physical object to digital information, eliminating the need for manual entry and reducing human error.
A Brief History of the Barcode
The barcode was first conceptualised in 1948 when Bernard Silver and Norman Joseph Woodland, students at Drexel Institute of Technology, began exploring ways to automate checkout processes in grocery stores. Drawing inspiration from Morse code, Woodland devised a system of lines and spaces to encode data.
They filed a patent in 1949, which was granted in 1952. However, barcode technology wasn’t commercially adopted until June 26, 1974, when a pack of Wrigley’s Juicy Fruit gum became the first product ever scanned at a Marsh supermarket in Troy, Ohio, using a Spectra Physics Model A scanner developed with Datalogic.
This milestone helped launch widespread adoption and led to the formation of the Uniform Code Council (now a member of GS1), the body responsible for setting global barcode standards.
Common Barcode TypesÂ
Barcodes come in two main categories: 1D (one-dimensional) and 2D (two-dimensional). Each is suited to different use cases based on how much information needs to be encoded and the scanning environment.
1. One-Dimensional (1D) Barcodes
These consist of vertical lines and are the most widely recognised type of barcode.
UPC (Universal Product Code)
Commonly used in retail across the U.S. and Canada.
EAN (European Article Number)
Similar to UPC, used internationally.
Code 39
Used in manufacturing and defense.
Code 128
Compact and high-density, ideal for logistics and shipping.
2. Two-Dimensional (2D) Barcodes
These use patterns like dots, squares, and hexagons to store more data in less space.
QR Code
Popular for marketing, mobile payments, and web links.
Data Matrix
Used in electronics and medical devices due to its small size.
PDF417
Found on identification cards and transport documentation.
Barcodes aren’t just black and white lines—they’re the foundation of automated data capture. By standardising product information, they help businesses:
- Track inventory in real-time.
- Speed up logistics and supply chain operations;
- Prevent errors in shipping and order fulfilment; and
- Ensure compliance with industry and regulatory standards.
Today, companies like Intermax continue to support businesses by providing barcode verification services, ensuring every scan counts and every label performs as expected.
Barcodes have come a long way from their origins in the 1940s. What started as an idea drawn from Morse code has become a global standard for tracking and automation. Whether you’re managing a warehouse, scanning items at a checkout, or tracking medical devices, barcodes are silently doing the heavy lifting, making everyday processes smarter, faster, and more accurate.
Need help choosing the right barcode solution for your business?
Intermax offers expert support, barcode verification services, and hardware solutions to keep your operations running smoothly and compliantly.
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