Liquid Paper
Now people still use the correction fluid, but more seldom. With more advanced technology, people have computers allowing them to backspace easily, not needing to use it. Also, there is also another recent invention of the correction tape. To use the fluid, you squeeze the bottle, and let the fluid flow out to cover the mistakes. Usually you have to shake the bottle before using it, and after using, you need to wait for it to dry for a few minutes, which is considered quite fast. Then you can write on top of the dried fluid.