Post-it note
Small piece of paper with a re-adherable strip of glue on its back
Post-it note
A Post-it note (or sticky note) is a small piece of paper with a re-adherable strip of glue on its back, made for temporarily attaching notes to documents and other surfaces. A low-tack pressure-sensitive adhesive allows the notes to be easily attached, removed, and even re-posted elsewhere without leaving residue. The Post-it's signature adhesive was discovered accidentally by a scientist at 3M. Originally small yellow squares, Post-it notes and related products are available in various colors, shapes, sizes, and adhesive strengths. As of 2026, there are at least 30 documented colors of Post-it notes. 3M's Post-it has won several awards for its design and innovation. Post-its are versatile and can be used in various settings for various purposes. They are commonly used in classrooms and workplaces but can also be found in art, media, and social media. Post-its have also been used as tools for public engagement and persuasion. Although 3M's patent expired in 1997, the "Post-it" brand name...
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