The rise of QR codes | Learn the English expression ‘the naked eye’

QR codes have exploded in popularity in recent years. The codes are integrated in ordering at restaurants, getting vaccines at COVID testing centers, purchasing bus tickets, and more. But have you ever stopped to think about exactly how the little black aMentioned in this episode:Black Friday is coming!Make plans to upgrade your English in 2025 with Plain English this Black Friday! We're hard at work on this year's promotion, but you can be the first to know when the promotions are announced! Just visit https://plainenglish.com/black to be notified.