TY  - BOOK
AU  - Hansen, Per Brinch
TI  - Operating system principles
U1  - 001.642 
PY  - 1980///
CY  - New Delhi
PB  - Prentice-Hall Of India
KW  - Operating Systems (Computers)
KW  - Computers -- Operating Systems
KW  - Programming Languages (Electronic Computer)
ER  -