4OS2 is the

OS/2 OS/2 (Operating System/2) is a series of computer operating systems, initially created by Microsoft and IBM under the leadership of IBM software designer Ed Iacobucci. As a result of a feud between the two companies over how to position OS/2 ...

analogue of 4NT and

4DOS 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, ...

JP Software 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, ...

, Inc. JP Software discontinued 4OS2,

TCMDOS2 Take Command Console (TCC), formerly known as ''4DOS for Windows NT'' (''4NT''), is a command-line interpreter by JP Software, designed as a substitute for the default command interpreter in Microsoft Windows, cmd.exe, CMD.EXE. Take Command was ...

and

TCMD16 Take Command Console (TCC), formerly known as ''4DOS for Windows NT'' (''4NT''), is a command-line interpreter by JP Software, designed as a substitute for the default command interpreter in Microsoft Windows, cmd.exe, CMD.EXE. Take Command was ...

, making version 3.0, 2.0, 2.0 the final version of these. The code for 4OS2 has been released, and is maintained, first by

SciTech SciTech, Scitech or Sci Tech may refer to: Businesses and organizations * Scitech, a not-for-profit science and technology organization in Western Australia * Sci-Tech Daresbury, a science-related business campus near Daresbury, Cheshire, England ...

, and then by NetLabs.

Overview

Early versions of 4OS2 run in the

Windows NT Windows NT is a proprietary graphical operating system An operating system (OS) is system software that manages computer hardware, software resources, and provides common services for computer programs. Time-sharing operating systems sc ...

OS/2 emulation, and it was this particular running that led

to port 4OS2 to

Microsoft Windows Windows is a group of several proprietary graphical operating system families developed and marketed by Microsoft. Each family caters to a certain sector of the computing industry. For example, Windows NT for consumers, Windows Server for serv ...

. 4NT, for example, still has the OS/2

CMD.EXE Command Prompt, also known as cmd.exe or cmd, is the default command-line interpreter for the OS/2, eComStation, ArcaOS, Microsoft Windows (Windows NT family and Windows CE family), and ReactOS operating systems. On Windows CE .NET 4.2, Windo ...

commands like EXTPROC and

REXX Rexx (Restructured Extended Executor) is a programming language that can be interpreted or compiled. It was developed at IBM by Mike Cowlishaw. It is a structured, high-level programming language designed for ease of learning and reading. ...

support, while earlier versions had commands like

DPATH In computing, dpath is an internal cmd.exe command on IBM OS/2 and Microsoft Windowshttps://ss64.com/nt/path.html#dpath that allows using a set of files with the TYPE command and with input redirection as if they are in the current directory. ...

and

LIBPATH An environment variable is a dynamic-named value that can affect the way running processes will behave on a computer. They are part of the environment in which a process runs. For example, a running process can query the value of the TEMP envi ...

, for setting these variables in the same manner that

PATH A path is a route for physical travel – see Trail. Path or PATH may also refer to: Physical paths of different types * Bicycle path * Bridle path, used by people on horseback * Course (navigation), the intended path of a vehicle * Desire p ...

does. The early 4OS2 packages came with both 16- and 32-bit versions, the former to run under OS/2 1.x including Windows NT OS/2. Eventually the 16-bit support was dropped.

have their final releases of these products at their download page. There was a 4OS2 v4.0 as different programmers took up maintaining the release, but these have been since merged. 4OS2 has found more recent life at NetLabs. It is included in

ArcaOS ArcaOS is an operating system based on OS/2, developed and marketed by Arca Noae, LLC under license from IBM. It was codenamed Blue Lion during its development. It builds on OS/2 Warp 4.52 by adding support for new hardware, fixing defects and l ...

References

{{DEFAULTSORT:4OS2 OS/2 software