<s>
Nord	B-Language
Programming	I-Language
Language	I-Language
(	O
NPL	B-Language
)	O
,	O
is	O
a	O
procedural	B-Application
programming	I-Application
language	I-Application
by	O
the	O
Norwegian	O
minicomputer	B-Architecture
manufacturer	O
Norsk	O
Data	O
.	O
</s>
<s>
It	O
shipped	O
as	O
a	O
standard	O
component	O
of	O
the	O
operating	B-General_Concept
system	I-General_Concept
Sintran	B-Operating_System
III	I-Operating_System
.	O
</s>
<s>
The	O
language	O
was	O
also	O
used	O
to	O
implement	O
Sintran	B-Operating_System
III	I-Operating_System
:	O
the	O
core	O
and	O
file	B-Application
system	I-Application
of	O
which	O
are	O
written	O
in	O
NPL	B-Language
,	O
as	O
was	O
the	O
NPL	B-Language
compiler	B-Language
,	O
and	O
some	O
core	O
applications	O
early	O
on	O
,	O
until	O
the	O
release	O
of	O
high-level	B-Language
programming	I-Language
language	I-Language
named	O
PLANC	B-Language
.	O
</s>
<s>
Then	O
,	O
the	O
linker	B-Application
and	O
other	O
software	O
were	O
rewritten	O
in	O
PLANC	B-Language
.	O
</s>
<s>
The	O
NPL	B-Language
compiler	B-Language
was	O
also	O
special	O
in	O
that	O
it	O
did	O
not	O
emit	O
object	B-Language
code	I-Language
as	O
most	O
compilers	B-Language
do	O
.	O
</s>
<s>
Instead	O
it	O
emitted	O
an	O
intermediate	B-Application
representation	I-Application
,	O
in	O
the	O
form	O
of	O
assembly	B-Language
language	I-Language
code	O
,	O
which	O
then	O
had	O
to	O
be	O
assembled	O
using	O
the	O
Norsk	B-Application
Data	I-Application
Assembler	I-Application
.	O
</s>
<s>
The	O
registers	O
of	O
the	O
CPU	O
were	O
available	O
in	O
NPL	B-Language
as	O
predefined	O
variables	O
.	O
</s>
<s>
and	O
the	O
compiler	B-Language
would	O
emit	O
:	O
</s>
<s>
Functions	O
could	O
be	O
declared	O
with	O
multiple	O
entry	B-Language
points	I-Language
:	O
</s>
