Scopus is Elsevier's abstract and citation database launched in 2004. Scopus covers nearly 36,377 titles (22,794 active titles and 13,583 inactive titles) from approximately 11,678 publishers, of which 34,346 are peer-reviewed journals in top-level subject fields: life sciences, social sciences, physical sciences and health sciences. It covers three types of sources: book series, journals, and trade journals. Scopus also offers author profiles which cover affiliations, number of publications and their bibliographic data, references, and details on the number of citations each published document has received. It has alerting features that allow registered users to track changes to a profile and a facility to calculate authors' h-index.

The Science Citation Index Expanded (SCIE) is a bibliographic database originally created by Eugene Garfield, produced by the Institute for Scientific Information (ISI), and now owned by Thomson Reuters—the company that releases the journal impact factor every year. The Science Citation Index (SCI) is a quarterly journal that publishes papers and articles in all fields of research. The SCIE is the updated version of SCI which is a accumulation of more than 8500 highly reputed journals across 150 different disciplines.

The University Grants Commission (UGC) in India is responsible for promoting and coordinating higher education in the country. If you're looking to publish a research paper as part of a PhD program and are interested in UGC-approved journals,