Friends, We know how Meta-data has replaced the term "Indexing" and"Cataloguing" in the last decade. Now it is turn of "Key Words" to bereplaced by a term called "tagging". The only difference in these twoterms is that "Key Words" are picked up from some standard vocabularylike MeSH by professionals; "tagging" is done by end users to bookmarkand categorize an internet resource without any rules or vocabulary.The intention is to retrieve the "tagged" resource in future. Butthere is a Method in this Madness of tagging. The user indirectlyregisters a "vote" in favor of the resource being tagged. Such voteswhen collected on a service provider end can be used to indicaterelative popularity of various resources. Del.icio.us <http://del.icio.us > is one of such service. This collective behavioris known "collaborative tagging". Macgregor, George and McCulloch, Emma in their pre-print <http://eprints.rclis.org/archive/00005703/ > [accepted forpublication] has suggested that Librarians and informationprofessional researchers should take a leading role in research aimedat assessing the efficacy of collaborative tagging in relation toinformation storage, organization, and retrieval, and to influence thefuture development of collaborative tagging systems. I myself am a regular user of Del.icio.us < http://del.icio.us >. Ican keep links to my favorite articles; blogs; sites etc and canaccess them and access them from any computer on the web. I can sharethem easily by just by giving its URL < http://del.icio.us/sukhi >.Moreover I can check up who else have tagged a particular resource ofmy interest. Exploring further I can find out from other's tags whatall other resources could be of my interest. Does not this soundsimilar to "Pearl Growing" in Science Citation Index? Suchcollaborative tagging site also presents what is known as "Tag Cloud"showing relative importance of tags in terms size and colour of fonts. So when will the term "Key Words" be replaced by "tags"? --Sukhdev Singh, NIC.http://openmed.nic.in