Early versions of 4OS2 run in the
Windows NT OS/2 emulation, and it was this particular running that led
JP Software to port 4OS2 to
Microsoft Windows.
4NT, for example, still has the OS/2
CMD.EXE commands like
EXTPROC and
REXX support, while earlier versions had commands like
DPATH and
LIBPATH, 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. ==References==