TY  - GEN
AU  - Beck , Leland L.
TI  - System software an introduction to systems programming
SN  - 8178080362
U1  - 005.12 
PY  - 1999///
CY  - New Delhi
PB  - Pearson Education
KW  - OPERATING SYSTEM
KW  - COMPUTER SCIENCE
KW  - SOFTWARE SYSTEM
ER  -