From times immemorial, man has lived in a social system (a large group), and the family (a small group) is an integral part of it. On this earth, there are groups, large or small, which influence our social system, social relations, and communication. Groups exist in every organisation and they affect the behaviour of their members and also other groups. They have also an impact on the whole organisation. If one wants to study an organisation, one will have to understand the groups existing in that organisation and their functioning. There are so many small groups in an organisation. Such groups are formed by the organisation by dividing its ultimate task into small tasks which are assigned to various subunits known as departments,
sections, units etc. Besides, there are many other groups which are created automatically (may be called informal groups) because of the operation of socio-psychological factors at the workplace.