TY  - GEN
AU  - The open university
TI  - Unit 14 The PDP 11 computer systems unit 15 operating systems
SN  - 0335171222
U1  - 005.43,OPE 
PY  - 1983///
CY  - New York
PB  - The open university press 
KW  - Operating system
N1  - Introduction (Page-7),  PDP 11 Computer Sys (Page-7), PDP 11 Computer Hardware (Page-12), Input And Output Of Data (Page-21), Software For PDP 11 Computers (Page-40).
ER  -