What is a QR code?
Do you really know? 
About this episode
What is a QR code? Thanks for asking! QR codes have likely never been used more than in the Covid age. They’ve become ubiquitous especially since the NHS started using them for its test and Trace app. These odd black-and-white grids may all look alike, but in fact every QR code is unique. QR codes, or quick response codes to give them their full name, were first invented by Japanese engineer Masahiro Hara, working at Denso Wave, a subsidiary of Toyota. They were used in factories to track vehicles while they were being assembled, and to scan components. Of course QR codes really took off in the 21st century, and in particular with the rise of the smartphone. What are QR codes used for? So how do QR codes actually work? Can we create a QR code? In under 3 minutes, we answer your questions! To listen to the last episodes, you can click here: What are the Paralympics? What is sapiosexuality? What is the Taliban offensive? A podcast written and realised by Joseph Chance. See acast.com/privacy for privacy and opt-out information. Learn more about your ad choices. Visit megaphone.fm/adchoices
Listen to this episode in English to learn English
Podcast episodes are one of the highest-density ways to absorb English at native pace. What is a QR code? from Do you really know? gives you natural dialogue, unscripted speech, and vocabulary that actually appears in real conversations.
In the Clue app, every word in the transcript is tappable. Tap an unknown word, see the translation in your language instantly, and keep listening without breaking flow.