Anyone who's ever visited a supermarket checkout knows what a barcode is.
Lift any item from their shelves and the ubiquitous barcode label will instantly stand out. With a series of black bars and a row of numbers, the barcode's used to track stock items and calculate your shopping bill.
The barcode may seem to have been around forever but it only went mainstream in 1974.
History of the Barcode
The first barcode was invented in 1932 by Wallace Flint who dreamed of an automated system for retail stores. Yet the technology at the time halted its development.
Barcodes became available in 1966 but only went mainstream in 1973. And the first product to have a barcode? Wrigley's Gum.
In 1991 the bars and stripes pattern was introduced which is the same format that we use today.
What Are QR Codes?
Barcodes are one-dimensional in that they're read in one direction.
Many companies needed to include more information and the 2D format was born. It offered left-to-right and up-and-down reading and could add much more data within a small space.
A company in Japan went one step further and added position detection to make the reading process even quicker. The Quick Response or QR code was created as a result.
Types of Barcodes and QR Codes There are around 30 types of barcode formats including the QR code.
Each is categorized into numeric-only, alpha-numeric or text and numbers only, and two-dimensional. The first two are termed one-dimensional or 1D and stretch sideways. The 2D formats like QR codes are in the shape of a square or rectangle.
Common barcode types include:
Code 128 displays both letters and numbers and is easy to scan with its broad character set. It also allows for ASCII symbols which means it can include characters like a dollar sign $.
QR Codes are one of the most popular forms of 2D barcodes, a format that can hold 7,089 characters. Other 2D types include:
You'll soon discover how to create all these 2D formats along with Code 128 barcodes using PDF4me's QR code generator. But before you learn how to create QR codes what are they used for in everyday life?
What Are QR Codes Used For?
You can store all sorts of data in QR codes like your contact information and website links. You'll see them in magazines, billboards, shop windows, or even on t-shirts.
The main reason they've become so popular is that you don't need a laser scanner to read them.