TY  - GEN
AU  - Deitel , Harvey M.
TI  - An introduction to operating systems
SN  - 8177581678
U1  - 005.43 
PY  - 1990///
CY  - Delhi
PB  - Addison Wesley
KW  - COMPUTER SCIENCES
KW  - DOS
KW  - COMPUTER OPERATING SYSTEMS
ER  -