start (command)
In computing, start is a command of the IBM OS/2,[1] Microsoft Windows[2] and ReactOS[3] command-line interpreter cmd.exe[4] (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 ReactOS  start command | |
| Developer(s) | IBM, Microsoft, ReactOS Contributors | 
|---|---|
| Operating system | OS/2, Microsoft Windows, ReactOS | 
| Type | Command | 
The command is also one of the basic commands implemented in the Keyboard Monitor (KMON) of the DEC RT-11 operating system.[5]
The TOPS-10[6] and TOPS-20[7] operating systems also provide a start command. It is used to start a program in memory at a specified address.
Other environments
    
- 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[8] andrun-mailcap. - On Cygwin, the command is implemented as the 
cygstartexecutable.[9] - In PowerShell, the 
Invoke-Itemcmdlet is used to invoke an executable or open a file.[10] - On Apple macOS, the corresponding command is 
open. - On Stratus OpenVOS it is 
start_process.[11] 
Syntax
    
    Windows, ReactOS
    
start "title" [/D path] [options] "command" [parameters]
Examples
    
    Windows, ReactOS
    
C:\>start notepad file.txt
C:\>start "C:\My Music\My Song.mp3"
C:\>start www.wikipedia.org
References
    
- "JaTomes Help - OS/2 Commands". Archived from the original on 2019-04-14. Retrieved 2019-07-06.
 - "MS-DOS and Windows command line start command".
 - "Reactos/Reactos". GitHub. 3 January 2022.
 - Start - TechNet, Microsoft
 - "Rt-11 Help File". Archived from the original on 2018-07-17. Retrieved 2018-07-16.
 - TOPS-10 Operating System Commands Manual (PDF). Digital Equipment Corporation. August 1980. Archived from the original (PDF) on 2020-08-09. Retrieved 2019-02-17.
 - "TOPS-20 Command manual" (PDF). Archived from the original (PDF) on 2020-08-09. Retrieved 2018-07-18.
 - "XDG-utils".
 - "cygstart man page on Cygwin". www.polarhome.com.
 - https://ss64.com/nt/start.html
 - Stratus Technologies Bermuda, Ltd (2017). "OpenVOS Commands Reference Manual" (PDF).
 
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.
 
External links
    
Wikibooks has a book on the topic of: Guide to Windows Commands
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