Being an inventor and entrepreneur may sound exciting, but it can also be difficult and unpredictable. Consider, for example, the case of Gideon Sundback. This Swedish engineer came up with a breakthrough idea about 100 years ago. Although the type of fastener he introduced in 1914 seems indispensable today, the device took a surprisingly long time to catch on. It could make closing up footwear, clothing, and bags much faster and easier than doing so with buttons and hooks, but it met with little more than indifference until a catchy name helped it finally take off during the 1920s and 1930s. What, exactly, was this invention? Originally known as the “Hookless No.2,” Sundback’s clever device came to be called the “zipper”—a fastener that is available today on countless handbags, backpacks, pairs of boots, pairs of pants, jackets, suitcases, and so on.