Not all but most DOS software can run on Windows 98..
This was taken out of Windows XP, but is still in Windows 98 and below.
Yes.
No, unless it's an MS-DOS game or the pc game disk says windows 98 on it
in windows 98 its start,run,command. or you can boot into ms-dos by going to start,shutdown,restart into ms-dos.
Microsoft DOS, Windows 95, Windows 98, Windows 2000, Windows ME, Windows XP, Windows Vista, Windows 7.
FDISK
device=ansi.sys
AmigaOS MS-DOS (and compatibles like FreeDOS, DR-DOS, ROM-DOS) Windows 1.0 Windows 2.x Windows 3.x Windows 95 Windows 98 Windows ME Windows CE Mac OS / System Software 1 - 9 AtariDOS
Windows 2000, XP, and Vista do not have a "DOS mode." To start Windows 95 and 98 in MS-DOS mode, press F8 when the splash screen appears. Then select "Start computer in MS-DOS mode" from the list.
MS-DOS Windows 1.0 Windows 2.0 Windows 3.0 Windows 3.1 Windows 95 Windows 98 Windows ME
It's the System folder. But if you are looking for windows/dos commands you'll find them in the Command folder