 | This article needs additional citations for verification. (October 2016) |
 | |
| Developer(s) | JP Software |
|---|---|
| Stable release | 8.00 (Open Source in 2009)
/ 7.50.130 (JPSoft in 2004) |
| Operating system | DOS, Windows |
| Type | Command shell |
| License | modified MIT License that does not qualify as open source by Open Source Initiative or Free Software Foundation standards |
| Website | 4dos.info |
4DOS is a command-line interpreter by JP Software, designed to replace the default command interpreter COMMAND.COM in Microsoft DOS and Windows. It was written by Rex C. Conn and Tom Rawson and first released in 1989. Compared to the default, it has a large number of enhancements.
4OS2 and 4NT are similar products that replace cmd.exe in OS/2 and Windows NT respectively.