Post-it Notes are celebrating their 29th anniversary, and the simple little memo sheets which were officially stuck on shelves April 6, 1980 have become an integral part of the home and office.
Post-its were a collaborative effort between Dr. Spencer Silver, who created the special adhesive that makes them stick, and his colleague Art Fry, who had the genius idea to put the adhesive on the back of little sheets of paper.
Though Post-its started out with just the classic canary notes, today theyre available in eight standard sizes, 25 shapes, and 62 colors.
The smallest Post-its are 0.5-inch by 1.75-inch flags, and the biggest ones, dubbed easel pads, are 25 by 30 inches.
According to researchers, it would take 506,880,000 Post-its to circle the world once.
Todays average professional receives 11 Post-it messages each day, so clearly, the idea born decades ago has really stuck.
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