cmd.exe is the default command-line interpreter for OS/2, eComStation, Microsoft Windows (Windows NT family and Windows CE family), and the ReactOS operating systems. The name refers to its executable filename. It is also commonly referred to as cmd or the Command Prompt, referring to the default window title on Windows. The implementations differ on the various systems but the behavior and basic set of commands is generally consistent. cmd.exe is the counterpart of COMMAND.COM in DOS and Windows 9x systems, and analogous to the Unix shells used on Unix-like systems. The initial version of cmd.exe for Windows NT was developed by Therese Stowell.Windows CE 2.11 was the first embedded Windows release to support a console and a Windows CE version of cmd.exe.
On Windows CE .NET 4.2, Windows CE 5.0 and Windows Embedded CE 6.0 it is also referred to as Command Processor Shell.
The ReactOS implementation of cmd.exe is derived from FreeCOM, the FreeDOS command line interpreter.

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