Since the activities of tertiary sector generate services rather than goods, it is called service sector. It includes some essential services that may not directly help in the production of goods. We require teachers, doctors and those who provide personal services such as washermen, barbers, cobblers, lawyers and people to do administrative and accounting works. In recent times, certain new services based on information technology such as Internet cafe, ATM booths, call centres, software companies, etc. have become important.