TY  - BOOK
ED  - Microsoft Corporation
TI  - Microsoft MS-DOS Operating System Version 4.01: For Personal Computers 100% Compatible with IBM Personal Computers : Includes Microsoft GW-Basic Interpreter 
PY  - 1987///
CY  - Washington
PB  - Microsoft Press
KW  - Operation Systems-DOS
N1  - Microsoft MS-DOS (118 p., ill.); Microsoft GW-BASIC (274 p., tabl.); Microsoft MS-DOS (430 p.)
ER  -