TY  - BOOK
AU  - Lorin Harold
AU  -  Deitel Harvey M
TI  - Operating systems
T2  - Systems progtamming series
U1  - D65,8(B)92, M1     M1;4           M1;5 
PY  - 1981///
CY  - Reading
PB  - Massachusetts Addison Wesley       
KW  - Operating system
N1  - Bibliography 353-362p
ER  -