start (command)
In computing, start
is a command of the IBM OS/2, Microsoft Windows and ReactOS command-line interpreter cmd.exe (and some versions of COMMAND.COM) to start programs or batch files or to open files or directories using the default program. start
is not available as a standalone program. The underlying Win32 API is ShellExecute
.
The command is also one of the basic commands implemented in the Keyboard Monitor (KMON) of the DEC RT-11 operating system. The TOPS-10 and TOPS-20 operating systems also provide a start
command. It is used to start a program in memory at a specified address.
Other environments

START
command of RT-11SJ displayed on a VT100.- Typical Unix shells (bash, etc.) have no built-in registry of file types and associated default applications. Linux command-line tools with similar functions include
xdg-open
andrun-mailcap
. - On Cygwin, the command is implemented as the
cygstart
executable. - In PowerShell, the
Invoke-Item
cmdlet is used to invoke an executable or open a file. - On Apple macOS and MorphOS, the corresponding command is
open
. - On Stratus OpenVOS it is
start_process
.
Syntax
Windows, ReactOS
start ["title"] [/D path] [/I][/B][/MIN][/MAX][/WAIT] [command/program] [parameters]
"title" Title of the window.
Path Specifies the startup directory.
I Use the original environment given to cmd.exe, instead of the current environment.
B Starts the command or program without creating any window.
MIN Starts with a minimized window.
MAX Starts with a maximized window.
WAIT Starts the command or program and waits for its termination.
command Specifies the parameters to be given to the command or program.
Examples
Windows, ReactOS
C:\>start notepad file.txt
C:\>start "C:\My Music\My Song.mp3"
C:\>start www.wikipedia.org
See also
References
Further reading
- Kathy Ivens; Brian Proffit (1993). OS/2 Inside & Out. Osborne McGraw-Hill. ISBN 978-0078818714.
- Frisch, Æleen (2001). Windows 2000 Commands Pocket Reference. O'Reilly. ISBN 978-0-596-00148-3.