TY  - BOOK
AU  - Deitel, Harvey M...[et al.].
AU  - Deitel, Paul J,
AU  - and Choffnes, David R.
TI  - Operating system
SN  - 9788131712894
U1  - 005.43 22
PY  - 2011///
CY  - New Delhi
PB  - Pearson Education
ER  -