Dear Readers: Informatics Studies commemorates the contributions of S R Ranganathan to Knowledge Management Scenario by devoting to him its Volume 2019. The volume contains his selected papers of perpetual relevance from archives of different organizations; current studies specific to them; studies on his theories of classification, a select bibliography on his most important contribution - Colon Classification, abstracts of his important works, a detailed life sketch with select historic photographs relating to places; of his birth and childhood, school and college, family, friends and colleagues, institutions where he worked, and national and international meetings and conferences he attended along with sketched on him a reputed artist.. First part of the Ranganathan Memorial volume has already been published and its online version is accessible at http://52.205.22.215/index.php/informatics. In the lead study in it Eric Johnson opined that 'Ranganathan's ideas have influenced library classification since the inception of his Colon Classification. Fifty years later, the Internet and its achievements, social ecology, and consequences present a far more complicated picture. But the systematic nature of Ranganathan's canons, principles, postulates, and devices suggest that modern semantic algorithms could guide automatic subject tagging. Johnson presents in the study a vision of internet-wide faceted classification and retrieval, implemented as open, distributed facets providing unified faceted searching across all web sites. Now we are publishing the second part of the Memorial Volume and its online version is accessible at http://52.205.22.215/index.php/informatics. Third part will be published shortly. Papers on S R. Ranganathan are invited for the fourth part (Informatics Studies Volume 6 Issue 4) to be published in 2019 October first week.Thanks for the continuing interest in our work, Dr. Raman Nair R Editor, Informatics Studies, Trivandrum – 43, India ramannair.r@gmail.com Phone 9387826738 -- This message has been scanned for viruses and dangerous content by MailScanner, and is believed to be clean.