cmd.exe

Its implementations differ between operating systems, but the behavior and basic set of commands are consistent.

The initial version of cmd.exe for Windows NT was developed by Therese Stowell.

[7] The ReactOS implementation of cmd.exe is derived from FreeCOM, the FreeDOS command line interpreter.

[9] For example:On Windows XP or later, the maximum length of the string that can be used at the command prompt is 8191 (213-1) characters.

[10] Quotation marks are required for the following special characters:[8] and white space.

OS/2 Window (cmd.exe) on Microsoft OS/2 Version 1.3
cmd.exe on Windows 11
Pocket CMD v 3.0 (cmd.exe) on Windows CE 3.0
Command Prompt (cmd.exe) on ReactOS