Write a short note on public sector and private sector?

Business enterprises owned and managed by individuals or group of individuals come under the private sector. For example : Cooperative societies, Sole proprietorship.
Enterprises that are managed and owned partly or wholly by the Central or State Government come under the public sector. Such enterprises are either a part of the concerned ministry or are created by a special act of the parliament. For example : Departmental undertakings, Government companies, Statutory corporations.