It can be used to help teachers to make their teaching plans and help the students to remember English words. If it is used in a ticket office, it will be much easier for passengers to buy their tickets. If you put the information about different illnesses into the computer, it will tell you what's wrong with you and what medicine you should take. Although the computer is a bit expensive, it will save you a lot of time and give you more pleasure. So it is not a waste of money to buy it.