<s>
4OS2	B-Application
is	O
the	O
OS/2	B-Application
analogue	O
of	O
4NT	B-Application
and	O
4DOS	B-Application
by	O
JP	B-Application
Software	I-Application
,	I-Application
Inc	I-Application
.	I-Application
JP	B-Application
Software	I-Application
discontinued	O
4OS2	B-Application
,	O
TCMDOS2	B-Application
and	O
TCMD16	B-Application
,	O
making	O
version	O
3.0	O
,	O
2.0	O
,	O
2.0	O
the	O
final	O
version	O
of	O
these	O
.	O
</s>
<s>
The	O
code	O
for	O
4OS2	B-Application
has	O
been	O
released	O
,	O
and	O
is	O
maintained	O
,	O
first	O
by	O
SciTech	O
,	O
and	O
then	O
by	O
NetLabs	O
.	O
</s>
<s>
Early	O
versions	O
of	O
4OS2	B-Application
run	O
in	O
the	O
Windows	B-Device
NT	I-Device
OS/2	B-Application
emulation	O
,	O
and	O
it	O
was	O
this	O
particular	O
running	O
that	O
led	O
JP	B-Application
Software	I-Application
to	O
port	O
4OS2	B-Application
to	O
Microsoft	B-Application
Windows	I-Application
.	O
</s>
<s>
4NT	B-Application
,	O
for	O
example	O
,	O
still	O
has	O
the	O
OS/2	B-Application
CMD.EXE	B-Device
commands	O
like	O
EXTPROC	O
and	O
REXX	B-Language
support	O
,	O
while	O
earlier	O
versions	O
had	O
commands	O
like	O
DPATH	B-Device
and	O
LIBPATH	B-Device
,	O
for	O
setting	O
these	O
variables	O
in	O
the	O
same	O
manner	O
that	O
PATH	O
does	O
.	O
</s>
<s>
The	O
early	O
4OS2	B-Application
packages	O
came	O
with	O
both	O
16	O
-	O
and	O
32-bit	O
versions	O
,	O
the	O
former	O
to	O
run	O
under	O
OS/2	B-Application
1.x	O
including	O
Windows	B-Device
NT	I-Device
OS/2	B-Application
.	O
</s>
<s>
JP	B-Application
Software	I-Application
have	O
their	O
final	O
releases	O
of	O
these	O
products	O
at	O
their	O
download	O
page	O
.	O
</s>
<s>
There	O
was	O
a	O
4OS2	B-Application
v4.0	O
as	O
different	O
programmers	O
took	O
up	O
maintaining	O
the	O
release	O
,	O
but	O
these	O
have	O
been	O
since	O
merged	O
.	O
</s>
<s>
4OS2	B-Application
has	O
found	O
more	O
recent	O
life	O
at	O
NetLabs	O
.	O
</s>
<s>
It	O
is	O
included	O
in	O
ArcaOS	B-Device
.	O
</s>
