Revenue analysis of a telecom operator on voice call using an approach of apriori algorithm and propose some business plans / [MS Thesis] Computer science 518.1 REV Thesis (M.S.) -- Department of Computer Science and Engineering, University of Dhaka, 2004-2005 Includes bibliographical references Dhaka : University of Dhaka, 2008. 2008. 2008 Text vi, 33, vii p. ; eng