class xii Bangia, Ramesh creator text New Delhi Laxmi Publications Pvt. Ltd. monographic xiii, 589+112 p. : ill. ; 23 cm. Includes index. Computer science Informatics practices Reference storage Organizational forms Manual apparatus Intake outflow Business computer Information retrieval Data management Human factors Mechanisation Reproduction FC 658.4038 BAN 9788170087922 (pbk)