Which failed product of the 1980s accidentally led to the discovery of one of today's most widely used office supplies?

Even the most brilliant inventors and companies have had their share of spectacular failures. This trivia challenge explores one of history's most famous product failures that ultimately led to significant discoveries and innovations. Test your knowledge about how failure sometimes paves the way for future success in the world of invention and retail.

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The Post-it Note, which was created after Spencer Silver developed an adhesive that was too weak for its intended purpose
The Laser Printer, which was originally designed as a heating device but failed to generate sufficient temperatures
The Bubble Wrap, which was initially marketed as textured wallpaper before failing in the retail market
The Computer Mouse, which was a failed attempt at creating a digital drawing tool before being repurposed