TY  - BOOK
AU  - Deitel, H.M.
AU  - Deitel, P.T.
AU  - Choffnes, D.R.
TI  - Operating system
SN  - 8131712893
U1  - 005.43 
PY  - 2004///
CY  - New Delhi
PB  - Pearson education
ER  -