Meaning – The data those have been collected and analyzed already by some departments, organizations, NGO’s etc … are called Secondary data.

Types of Secondary sources of data

1. Published sources – There are 5 types

1. International publications: In this publications-year books, monographs and reports are published by different agencies of the united nations. 

2. Government publication: These publications comprise the census of India published by office of the register general of India. 

3. Semi Government publication : In this category the publications and reports of corporations, boards, urban development authorities etc … 

4. Private publication : The research reports, surveys, yearbooks and monographs are published. 

5. Newspapers and Periodicals : The daily news papers and periodicals or magazines are easily accessible.

2. Unpublished sources – There are 3 types.

1. Government Documents : The reportš, papers, findings, monographs and documents are prepared and maintained as unpublished records at different levels of Government. 

2. Government Records : The corporations, boards, district councils and civil departments prepare and maintain the periodical reports and the development plans. 

3. Private Documents : The companies, trade unions, different political and non-political organizations and resident welfare associations arc having unpublished reports and records.