A STUDY ON VERTICAL MOBILITY OF EMPLOYEES IN PRIVATE BANKING SECTOR WITH SPECIAL REFERENCE TO CUDDALORE DISTRICT CHAPTER-1 INTRODUCTION 1.1 INTRODUCTION TO BANKING Bank is defined in many ways by various authors in the book son economics and commerce. It is very difficult to define a bank; because a bank performs multifarious functions may be defined in many ways according to their functions. The evolution of different types of banks, each specializing in a particular field, gives emphasis on each