There are 40 versions of the QR Code. Details of these are explained here.
7 minutes till you become a Quick Response(QR) Codes Expert, by shivak singh
4SQR-Code: A 4-state QR code generation model for increasing data storing capacity in the Digital Twin framework - ScienceDirect
QR code - Wikipedia
Getting Started with Hong Kong Faster Payment System (FPS)— 轉數快
QR code - Wikipedia
What is a QR code? Ways to Use QR codes
The QR data payload for different QR versions and error correction levels
QR Code Size: Minimum Size, Maximum Size & More [2023]
How do QR codes encode information? - Quora
Information capacity and versions of QR Code
DENSO WAVE Develops “rMQR Code”, a new rectangular QR Code that can even be printed in long, narrow spaces.
AI-driven artistic QR code generation went virus in China and overseas - PingWest
How to introduce it?
QR code - Wikipedia
Micro QR Code Scanner - Scanbot SDK
