• Post-it notes come in many different sizes and colours, and are usually sold in stacks of multiple sheets.
  
• Post-its were first manufactured by the American company 3M in 1981.
  
• In 2010, the Speak Good English Movement launched its “Get It Right” campaign. At various locations with high foot traffic, such as food courts, members of the public were encouraged to correct the improper use of Singlish with proper English on post-it notes, and paste them on dining tables.

即时贴 (Mainland China), 方便贴 (Mainland China), 随意贴 (Mainland China)

There is a story behind the invention of post-it notes. A scientist at the 3M Company originally wanted to develop a strong adhesive, but unexpectedly invented a glue that could be peeled off repeatedly without losing its adhesiveness. Meanwhile, another scientist in the company who was practising with his church choir was tired of the bookmarks in his hymn book always falling out. He wanted a bookmark that could be stuck on and repositioned without damaging the book’s pages. After the two scientists began collaborating, 3M was able to develop the post-it notes that are now used worldwide.