Quick Response codes, or QR codes, are everywhere. You sit down at a restaurant and to read the menu, you have to scan a QR code. You walk through a trade show, stop by a booth with stellar equipment, and to get that show discount, you gotta scan a QR code. You’re picking up a new couch you found on Facebook Marketplace. To Venmo the seller, they bring up the QR code for their account so you can scan it and easily reimburse them.