Co-operative societies are voluntary organizations formed by a group of individuals with common needs to achieve common goals. They operate according to democratic principles with open membership, one member one vote, and distribution of surplus among members. Co-operative societies work on the principles of self-help and mutual assistance. There are various types of co-operative societies formed to fulfill different needs like consumers' co-operatives, producers' co-operatives, marketing co-operatives, credit co-operatives, cooperative banks, farming societies, and housing societies. All co-operative societies are registered and regulated by the government.