The fact "an appointment book is for keeping track of tasks" is illustrated with the story:1. When a person has too many things to keep in mind during the day, it helps to have something to write it down in.2. Many find it easy to keep notebook just for this purpose.3. Of course it does no good if you forget where you put the book or dont write what you need to remember.4. Business people use appointment books.5. You can also use a calendar for this purpose.