TY  - BOOK
AU  - Deitel,Harvey M.
TI  - An introduction to operating systems
SN  - 8178080354
U1  - 005.43 20 
PY  - 1990/// ,1984. [repriented 2001]
CY  - New Delhi.
PB  - Preason Education Asia.
KW  - Operating systems (Computers)
N1  - Includes bibliographies and indexes
ER  -