nam a22 7a 4500 7321 7321 20190420113522.0 8120312414 9788120312418 AEF. 2nd ed. 005.29 TAN. Tanenbaum, A. 83 Operating system. 2nd ed. New delhi : Prentice-hall of india Pvt, Ltd. 2005. 939p.: 24cm. Include index. Operating system. 500 ddc BK 0 0 ddc 0 0 AEF AEF 2019-04-20 Gratics. 005.29 TAN. 8776 2019-04-20 2019-04-20 Book