Custom QR Codes

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Two-dimensional:

QR codes use both horizontal and vertical space to encode information, unlike traditional one-dimensional barcodes which only use horizontal space. 

Machine-readable:

They are designed to be read by imaging devices like cameras, which process the unique arrangement of black and white squares (or other colors). 

Data encoding:

QR codes can store a variety of data, including website URLs, email addresses, contact information, and other types of text. 

Scanning:

Most smartphones have built-in QR code scanners, or dedicated apps can be used to scan and decode the information. 

Versatile applications:

QR codes are used for a wide range of purposes, including accessing websites, displaying menus in restaurants, facilitating mobile payments, and more.