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 r ...
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, ...
by
JP Software, Inc. JP Software discontinued 4OS2,
TCMDOS2 and
TCMD16, 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, and then by
NetLabs.
Overview
Early versions of 4OS2 run in the
Windows NT
Windows NT is a proprietary graphical operating system produced by Microsoft, the first version of which was released on July 27, 1993. It is a processor-independent, multiprocessing and multi-user operating system.
The first version of Win ...
OS/2 emulation, and it was this particular running that led
JP Software 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 ...
.
4NT, for example, still has the OS/2
CMD.EXE 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. P ...
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 Name resolution (programming languages), dynamic-named Value (computer science), value that can affect the way running process (computing), processes will behave on a computer. They are part of the environment in wh ...
, for setting these variables in the same manner that
PATH 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.
JP Software 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 li ...
.
References
{{DEFAULTSORT:4OS2
OS/2 software