Accidental inventions can really change the world. Look at Power puff girls for instance, they were created with the accidental adding of chemical X and they have changed the world! No, really, accidental inventions have changed the world.
If you aren’t familiar with QR Codes, they’re the square black and white abstract-looking images that you’ll sometimes see on posters, ads and flyers. Using any one of the many scanning apps available, you can use your smartphone to scan the code.