The Post-it Note [0] was invented completely (1) 事故. In 1968, a scientist (2) 斯宾塞·西尔弗 was trying to create a super-strong adhesive. Instead, he ended (3) with a very weak one. For years, (4) 没有人 knew what to do with it. Then, a colleague realized it (5) 可以 be used to bookmark pages in his hymn book without damaging (6). Soon, the idea caught on, and (7) 天, you can find Post-it Notes in almost (8) 办公室 in the world.