TY  - BOOK
AU  - Deitel,H.M. 
TI  - Operating System 
SN  - 9788178080352
U1  - 005.43 
PY  - 2001///
CY  - Delhi: 
PB  - Addison Wesley publishing , 
KW  - Computer Science
KW  - MS-DOS
KW  - MVS
KW  - UNIX
ER  -