The fast technological era facilitated with various computational devices leads to the exponential growth of data, need proper treatment; well known data warehousing and data mining terms are directly imply to produce informational processing of these huge datasets. Apart from storing and updating routine data, data mining provide the extraction of valuable knowledge, actually needed for decision making. From scientific data to organizational details, sports to banking data or library to security concerns every field dealing with large amount of data require data mining tools to dig strategic information for their respective requirements. In this study, researchers will study some data mining application areas. © Medwell Journals, 2011.