<s>
NESL	B-Language
is	O
a	O
parallel	O
programming	O
language	O
developed	O
at	O
Carnegie	O
Mellon	O
by	O
the	O
SCandAL	O
project	O
and	O
released	O
in	O
1993	O
.	O
</s>
<s>
It	O
integrates	O
various	O
ideas	O
from	O
parallel	B-Operating_System
algorithms	I-Operating_System
,	O
functional	B-Language
programming	I-Language
,	O
and	O
array	B-Application
programming	I-Application
languages	I-Application
.	O
</s>
<s>
Nested	O
data	B-Operating_System
parallelism	I-Operating_System
:	O
this	O
feature	O
offers	O
the	O
benefits	O
of	O
data	B-Operating_System
parallelism	I-Operating_System
,	O
concise	O
code	O
that	O
is	O
easy	O
to	O
understand	O
and	O
debug	O
,	O
while	O
being	O
well	O
suited	O
for	O
irregular	O
algorithms	O
,	O
such	O
as	O
algorithms	O
on	O
trees	O
,	O
graphs	O
or	O
sparse	O
matrices	O
.	O
</s>
<s>
The	O
main	O
design	O
guideline	O
for	O
NESL	B-Language
was	O
to	O
make	O
parallel	O
programming	O
easy	O
and	O
portable	O
.	O
</s>
<s>
Algorithms	O
are	O
typically	O
significantly	O
more	O
concise	O
in	O
NESL	B-Language
than	O
in	O
most	O
other	O
parallel	O
programming	O
languages	O
,	O
and	O
the	O
code	O
closely	O
resembles	O
high-level	O
pseudocode	O
.	O
</s>
<s>
NESL	B-Language
handles	O
nested	O
data	B-Operating_System
parallelism	I-Operating_System
by	O
using	O
the	O
flattening	O
transformation	O
to	O
convert	O
nested	O
data	B-Operating_System
parallelism	I-Operating_System
to	O
flat	O
data	B-Operating_System
parallelism	I-Operating_System
.	O
</s>
<s>
NESL	B-Language
heavily	O
influenced	O
Data	B-Operating_System
Parallel	I-Operating_System
Haskell	B-Language
.	O
</s>
