TY  - BOOK
AU  - Ritchie, Colin
TI  - Operating Systems Incorporating Unix and MS DOS 
SN  - 8170296420
U1  - 005.43 
CY  - New Delhi : 
PB  - BPB Publications, 
KW  - MS DOS Computer Operating System
KW  - Operating Systems Computers
KW  - UNIX Computer File
N1  - NN
UR  - https://eaklibrary.neduet.edu.pk:8443/catalog/bk/books/toc/81-7029-642-0.pdf
ER  -