Lesson #427

QR codes are everywhere in the modern economy

QR codes have a variety of uses in the modern economy. They help us do everything from purchasing train tickets to getting COVID tests. The technology was actually invented in 1994, but they’ve come a long way since then. Last week in lesson 425, we talked about the origin and rise of QR codes, and today’s lesson discusses the many uses for them. Plus, learn “fill out.”