, .
, .
MS DOS (. 9.9):
BIOS (Basic Input/Output System) -;
- BIOS (Extension Module BIOS) IO.SYS;
( - Basic Module) () MSDOS.SYS;
(CI Command Interpreter) COMMAND.COM;
, .COM,.EXE,.SYS;
(SB System Bootstrap);
DOS: MS DOS QBASIC; MS DOS EDITOR, ; DEBUG .
. 9.9. MS DOS
BIOS, BIOS, () , .
DOS, , , .
MS DOS, BIOS, , , . MS DOS . . .