<s>
NPL	O
(	O
for	O
NonProcedural	B-Language
Language	I-Language
)	O
was	O
a	O
relational	B-Application
database	I-Application
language	O
developed	O
by	O
T.D.	O
</s>
<s>
in	O
1980	O
for	O
Apple	B-Device
II	I-Device
and	O
MS-DOS	B-Application
.	O
</s>
<s>
In	O
general	O
,	O
a	O
non-procedural	O
language	O
(	O
also	O
called	O
a	O
declarative	B-Language
language	I-Language
)	O
requires	O
the	O
programmer	O
to	O
specify	O
what	O
the	O
program	O
should	O
do	O
,	O
rather	O
than	O
(	O
as	O
with	O
a	O
procedural	B-Application
language	I-Application
)	O
providing	O
the	O
sequential	O
steps	O
indicating	O
how	O
the	O
program	O
should	O
perform	O
its	O
task(s )	O
.	O
</s>
