<s>
The	O
Integrated	B-General_Concept
Language	I-General_Concept
Environment	I-General_Concept
(	O
ILE	O
)	O
is	O
a	O
programming	O
model	O
developed	O
by	O
IBM	O
for	O
their	O
AS/400	B-Device
line	O
of	O
computers	O
and	O
remains	O
an	O
important	O
part	O
of	O
the	O
IBM	B-Application
i	I-Application
programming	O
environment	O
.	O
</s>
<s>
IBM	O
provides	O
ILE	O
compilers	O
for	O
C	B-Language
,	O
C++	B-Language
,	O
RPG	B-Language
,	O
COBOL	B-Application
and	O
CL	B-Operating_System
.	O
</s>
<s>
For	O
RPG	B-Language
,	O
COBOL	B-Application
and	O
CL	B-Operating_System
,	O
there	O
are	O
both	O
OPM	O
compilers	O
(	O
still	O
sometimes	O
used	O
for	O
legacy	O
applications	O
)	O
and	O
the	O
new	O
ILE	O
compilers	O
.	O
</s>
<s>
Likewise	O
,	O
as	O
well	O
as	O
ILE	O
C	B-Language
,	O
there	O
was	O
an	O
earlier	O
EPM-based	O
C/400	O
,	O
although	O
that	O
has	O
been	O
discontinued	O
.	O
</s>
<s>
Pascal	B-Application
and	O
FORTRAN	B-Application
compilers	O
were	O
made	O
available	O
for	O
EPM	O
,	O
but	O
ILE	O
compilers	O
for	O
those	O
languages	O
have	O
never	O
been	O
released	O
;	O
likewise	O
,	O
BASIC	O
and	O
PL/1	B-Language
compilers	O
were	O
available	O
for	O
OPM	O
,	O
but	O
ILE	O
compilers	O
have	O
never	O
been	O
released	O
for	O
those	O
languages	O
either	O
.	O
</s>
<s>
On	O
February	O
16	O
,	O
1993	O
IBM	O
announced	O
that	O
V2R3	O
of	O
OS/400	B-Application
would	O
include	O
major	O
changes	O
to	O
its	O
programming	O
language	O
support	O
–	O
the	O
introduction	O
of	O
ILE	O
.	O
</s>
<s>
It	O
provided	O
a	O
common	O
interface	O
among	O
the	O
disparate	O
programming	O
languages	O
available	O
to	O
the	O
AS/400	B-Device
computer	O
platform	O
.	O
</s>
<s>
ILE	O
was	O
an	O
improvement	O
on	O
the	O
two	O
existing	O
programming	O
models	O
available	O
on	O
OS/400	B-Application
–	O
the	O
Original	O
Program	O
Model	O
(	O
OPM	O
)	O
,	O
which	O
was	O
used	O
for	O
traditional	O
business	O
programming	O
languages	O
such	O
as	O
RPG	B-Language
and	O
COBOL	B-Application
;	O
and	O
the	O
Extended	O
Programming	O
Model	O
(	O
EPM	O
)	O
,	O
which	O
was	O
introduced	O
for	O
use	O
by	O
C	B-Language
and	O
Pascal	B-Application
.	O
</s>
<s>
OS/400	B-Application
(	O
now	O
IBM	B-Application
i	I-Application
)	O
continues	O
to	O
support	O
OPM	O
and	O
EPM	O
to	O
run	O
legacy	O
applications	O
,	O
but	O
new	O
development	O
is	O
encouraged	O
to	O
be	O
in	O
ILE	O
(	O
or	O
PASE	O
,	O
the	O
Portable	O
Applications	O
System	O
Environment	O
,	O
which	O
provides	O
partial	O
binary	O
compatibility	O
with	O
AIX	B-Application
)	O
.	O
</s>
