What does 'QR' stand for in QR code?
AnswerQuick Response
QR stands for Quick Response, reflecting how fast the code can be read.
Tech · Facts & stats
QR facts & stats
7 fact-checked facts about QR codes, each with the reason behind it. 5 more are in today's round and join this page after it closes.
The basics
A QR code stores information as a pattern of what?
AnswerDark and light squares
QR codes encode data in a grid of dark and light square modules.
Going deeper
How many large square position markers are in the corners of a standard QR code?
Answer3
Three finder patterns in the corners let scanners locate the code and its orientation.
QR codes were first created to track what?
AnswerCar parts during manufacturing
They were designed to track automotive components in factories.
What are the individual small squares in a QR code called?
AnswerModules
Each dark or light square in a QR code is called a module.
Expert level
How many error-correction levels does the QR code standard define?
Answer4
The four levels are L, M, Q and H, each able to recover more damage than the last.
How many modules wide is a Version 1 QR code, the smallest size of a regular QR code?
Answer21
Version 1 is 21 × 21 modules, and each higher version adds 4 modules per side.
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