QR code
type of matrix barcode (trademarked name)
Episodes
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#5829: Printing Files on Paper That Outlasts the SoftwareOptar and PaperBack turn any file into machine-readable dots on paper. The paper lasts centuries — the codec might not. -
#5233: One Tap Beats Eight Links: Designing a Digital Business CardMost digital cards fail in ten seconds. Here's the design that actually starts a conversation.