In which famous company's labs was the adhesive used in Post-it Notes accidentally discovered when a scientist was trying to develop something completely different?

The world of product development is filled with fascinating stories of accidental discoveries that changed our daily lives. Some of the most successful products were born from failed experiments or unexpected observations. This trivia question explores the fascinating origin story behind one of the most ubiquitous office supplies that revolutionized how we organize information and communicate ideas.

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3M (Minnesota Mining and Manufacturing Company)
Xerox PARC (Palo Alto Research Center)
Bell Labs
IBM Research