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. Advertisement 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.