Glossary

Quiet zone: The clear margin around a QR symbol that must remain free of other artwork.
Module: One small square unit in the QR pattern; it is not the whole code.
Static QR: A code whose encoded information stays the same after generation.
Error correction: Redundant encoded information that can help recover some damaged data, within limits.
vCard: A structured contact format used to share fields such as a name, phone and email.