TY  - BOOK
AU  - Davis,William S.
TI  - PC-DOS & MS -DOS
SN  - 201198223
U1  - 005.4 W85c 
PY  - 1990///
CY  - Nacogdoches , Texas
PB  - Addison-Wesley Publishing Company, 
KW  - Computer operating system
N1  - Index
ER  -