These organisations affect our daily economic life and therefore become part of the Indian Economy. Indian Economy consists of both privately owned and government-owned business enterprises. Departmental Undertakings, this is the oldest form of public sector considered as enterprises. This chapter is incorporated with the concepts like – meaning of private and public sector, the form of public sector enterprises, departmental undertakings, its features, merits and demerits, Public corporation or Statutory corporation – its characteristic features, advantages and limitations, Government companies – advantages and disadvantages, the role of the public sector – its features, Global enterprises, Joint venture, its merits and demerits.