Despite creating security headaches for IT departments around the world as the password manager of choice for boomers, the Post-it Note is one of the most clever and ubiquitous office accessories ever created, and this past weekend the world, unfortunately, said goodbye — to their creator, Spencer Silver, who passed away at 80 years old. Most don’t give a second thought to the tiny sheets of yellow paper as they struggle to squeeze another important thing to remember onto their crowded computer screens, but like many world-changing technologies, the Post-it Note was a product born from failure that went on to become more successful than what its creator was originally trying to perfect.