Summary:
- The article discusses the invention of the Post-it Note, a small adhesive paper square that can be easily attached and removed from surfaces.
- It explains how the Post-it Note was created by accident by a 3M employee named Art Fry, who was looking for a way to mark pages in his hymnal.
- The article highlights how the Post-it Note has become a widely used office supply and has evolved over the years, with different sizes, colors, and designs available.