TY - BOOK AU - INDIRA GANDHI NATIONAL OPEN UNIVERSITY TI - INTRODUCTION TO SYSTEM SOFTWARE SN - 8172637268 AV - 658 IGN I U1 - 658 IGN I PY - 2011/// CY - NEW DELHI PB - INDIRA GANDHI NATIONAL OPEN UNIVERSITY KW - ENGLISH LITERATURE KW - INDIA ER -