<s>
Open	B-Language
Programming	I-Language
Language	I-Language
(	O
OPL	O
)	O
is	O
a	O
programming	O
language	O
for	O
embedded	B-Architecture
systems	I-Architecture
and	O
mobile	B-Application
devices	I-Application
that	O
run	O
the	O
operating	B-General_Concept
systems	I-General_Concept
EPOC	B-Language
and	O
Symbian	B-Operating_System
.	O
</s>
<s>
It	O
was	O
released	O
by	O
the	O
British	O
company	O
Psion	B-Application
in	O
1984	O
.	O
</s>
<s>
Originally	O
designed	O
for	O
use	O
on	O
their	O
classic	O
Psion	B-Application
PDAs	B-Application
such	O
as	O
the	O
Series	B-Application
3	I-Application
,	O
5/5mx	B-Application
,	O
Series	B-Application
7	I-Application
,	O
and	O
netBook	B-Application
–	O
netPad	O
,	O
and	O
the	O
Psion	B-Application
produced	O
MC218	B-Application
,	O
OPL	O
was	O
provided	O
as	O
part	O
of	O
the	O
standard	O
application	O
suite	O
.	O
</s>
<s>
It	O
can	O
also	O
be	O
installed	O
on	O
the	O
Nokia	O
9200	O
,	O
9300	B-Language
and	O
9500	B-Language
Communicator	O
series	O
mobile	O
telephone	O
and	O
personal	B-Application
digital	I-Application
assistant	I-Application
(	O
PDA	B-Application
)	O
and	O
the	O
Sony	B-Language
Ericsson	I-Language
P800	I-Language
,	O
P900	B-Language
,	O
P910	B-Language
series	O
.	O
</s>
<s>
OPL	O
is	O
also	O
included	O
in	O
Psion	B-Application
Teklogix	O
industrial	O
handhelds	B-Application
such	O
as	O
the	O
Workabout	O
mx	O
,	O
and	O
it	O
also	O
appeared	O
in	O
the	O
lesser	O
known	O
Oregon	O
'	O
Osaris	O
 '	O
organiser	O
,	O
a	O
broadly	O
compatible	O
EPOC32	O
device	O
that	O
uniquely	O
used	O
version	O
4	O
of	O
the	O
OS	O
.	O
</s>
<s>
OPL	O
is	O
an	O
interpreted	B-Application
language	I-Application
similar	O
to	O
BASIC	O
.	O
</s>
<s>
The	O
language	O
was	O
originally	O
named	O
Organiser	B-Language
Programming	I-Language
Language	I-Language
,	O
developed	O
by	O
Psion	B-Application
Ltd	I-Application
for	O
the	O
Psion	B-Application
Organiser	I-Application
.	O
</s>
<s>
The	O
first	O
implementation	O
(	O
without	O
graphics	O
)	O
was	O
for	O
the	O
original	O
Psion	B-Application
Organiser	I-Application
(	O
now	O
referred	O
to	O
as	O
the	O
Psion	B-Application
Organiser	I-Application
I	O
,	O
1984	O
)	O
,	O
and	O
it	O
came	O
bundled	O
with	O
the	O
Science	O
,	O
Finance	O
and	O
Math	O
data	B-General_Concept
packs	I-General_Concept
.	O
</s>
<s>
It	O
became	O
truly	O
accessible	O
as	O
built-in	O
software	O
in	O
the	O
Psion	B-Application
Organiser	I-Application
II	O
(	O
1986	O
)	O
,	O
and	O
the	O
language	O
went	O
on	O
to	O
be	O
used	O
in	O
the	O
Psion	B-Application
Series	I-Application
3	I-Application
and	O
later	O
.	O
</s>
<s>
After	O
Psion	B-Application
retired	O
from	O
the	O
personal	B-Application
digital	I-Application
assistant	I-Application
market	O
,	O
a	O
project	O
aiming	O
to	O
bring	O
OPL	O
to	O
Symbian	B-Operating_System
came	O
to	O
fruition	O
,	O
when	O
the	O
fledgling	O
Symbian	B-Operating_System
Developer	O
Program	O
released	O
it	O
as	O
open-source	B-Application
software	I-Application
.	O
</s>
<s>
The	O
language	O
is	O
now	O
available	O
on	O
SourceForge	B-Application
in	O
a	O
project	O
named	O
opl-dev	O
.	O
</s>
<s>
The	O
language	O
is	O
currently	O
unavailable	O
for	O
Symbian	B-Operating_System
OS	I-Operating_System
v8	O
and	O
later	O
.	O
</s>
<s>
With	O
the	O
subsequent	O
retirement	O
of	O
the	O
Symbian	B-Operating_System
OS	I-Operating_System
,	O
it	O
seems	O
unlikely	O
OPL	O
will	O
be	O
made	O
available	O
for	O
later	O
generations	O
of	O
Symbian	B-Operating_System
devices	O
.	O
</s>
<s>
As	O
of	O
2010	O
,	O
Nokia	O
device	O
developers	O
were	O
encouraged	O
to	O
use	O
Python	B-Application
for	I-Application
S60	I-Application
instead	O
(	O
See	O
Python	B-Application
for	I-Application
S60	I-Application
)	O
.	O
</s>
<s>
OPL	O
is	O
a	O
structured	B-Language
programming	I-Language
language	O
.	O
</s>
<s>
OPL	O
interfaced	O
with	O
advanced	O
Psion	B-Application
Series	I-Application
3	I-Application
features	O
by	O
means	O
of	O
operating	B-General_Concept
system	I-General_Concept
CALLs	O
,	O
but	O
in	O
the	O
later	O
Psion	B-Application
Series	I-Application
5mx	I-Application
this	O
was	O
changed	O
to	O
a	O
so-called	O
OPX	O
library	B-Library
,	O
stored	O
in	O
the	O
system	O
read-only	B-Device
memory	I-Device
(	O
ROM	B-Device
)	O
,	O
termed	O
the	O
Z	O
drive	O
.	O
</s>
<s>
'	O
OPX	O
 '	O
libraries	O
were	O
also	O
made	O
available	O
for	O
the	O
Nokia	B-Language
9210	I-Language
,	O
Nokia	B-Language
9300	I-Language
and	O
Nokia	B-Language
9500	I-Language
Communicators	I-Language
,	O
adding	O
OPXs	O
routines	O
for	O
handling	O
Short	O
Message	O
Service	O
(	O
SMS	B-Device
)	O
and	O
managing	O
Bluetooth	B-Protocol
communication	O
.	O
</s>
