Windows NT comes with two "command line
shells" -- one called CMD.EXE and the other called COMMAND.COM. If you're wondering which one to use, following
information might help:CMD.EXE is the Windows NT's native
command prompt (or shell), which means it is more portable among different hardware
platforms. For example, if you type SET and press ENTER inside a CMD.EXE prompt, you'll
notice that CMD.EXE exposes more environment variables than COMMAND.COM. On the other hand, COMMAND.COM
is the more "MS-DOS compatible" version of the two shells. For example, this
shell will call AUTOEXEC.NT and CONFIG.NT
(located in the SYSTEM32 directory inside your Windows NT
directory) just like MS-DOS used to call AUTOEXEC.BAT and CONFIG.SYS.
So, if you're having trouble running your old DOS command line programs from Windows
NT, try running them inside a COMMAND.COM shell, not CMD.EXE.
