Every day, we have messages to give people through Post-it Notes. They have a special glue on the edge (边缘) of the paper. They are sticky so that you can leave them anywhere and they won't fall off. You can reuse the notes because the special glue on the back doesn't wear off easily.
Who invented Post-it Notes? Art Fry was a scientist who worked for the famous 3M Company. He needed a bookmark that stayed in place but didn't tear (撕) the page when he wanted to remove it. So he took some of the weak glue a friend made and put it on the back of a yellow piece of paper. Then he wrote a report to his boss and put the yellow sticky paper on the top page. His boss took off the note, wrote an answer, stuck the paper back on, and sent it back. This was the beginning of Post-it Notes. It was a new and creative way to communicate.
Today, Post-it Notes are one of the most popular office products. Everyone uses them for many different purposes. One man used one to write a marriage proposal (求婚) and put it on his girlfriend's front door. She wrote her answer and put the note back on his door. One mother put a note on the back of her son's car before he left on a long trip. When he arrived, he found the note. After 3,000 miles, it was still on the car. One university student was waiting in the bus station and started to feel sleepy. She didn't want to miss her bus so she put Post-it Notes all over herself. The notes asked people to wake her up in time for her bus. She did fall asleep but her plan worked. Someone saw the notes and woke her up.
There are Post-it Notes to please everyone's tastes. You can buy Post-it Notes in fifty different colors, twenty-seven different sizes, and fifty-six different shapes. More than 400 Post-it products are sold in more than 100 countries around the world. Art Fry should be proud of his invention.
