TY  - BOOK
AU  - Barron, D.W.
TI  - Computer operating systems
U1  - 005.43 BAR-; 
PY  - 1971///
CY  - London
PB  - Chapman & Hall
KW  - Multi programming (Electronic computer)
KW  - Operating systems (Computers)
N1  - Includes index
ER  -