<s>
HPX	B-Operating_System
,	O
short	O
for	O
High	B-Operating_System
Performance	I-Operating_System
ParalleX	I-Operating_System
,	O
is	O
a	O
runtime	B-Device
system	I-Device
for	O
high-performance	B-Architecture
computing	I-Architecture
.	O
</s>
<s>
Focused	O
on	O
scientific	O
computing	O
,	O
it	O
provides	O
an	O
alternative	O
execution	O
model	O
to	O
conventional	O
approaches	O
such	O
as	O
MPI	B-Application
.	O
</s>
<s>
HPX	B-Operating_System
aims	O
to	O
overcome	O
the	O
challenges	O
MPI	B-Application
faces	O
with	O
increasing	O
large	O
supercomputers	B-Architecture
by	O
using	O
asynchronous	B-Architecture
communication	O
between	O
nodes	O
and	O
lightweight	O
control	O
objects	O
instead	O
of	O
global	O
barriers	O
,	O
allowing	O
application	O
developers	O
to	O
exploit	O
fine-grained	O
parallelism	O
.	O
</s>
<s>
HPX	B-Operating_System
is	O
developed	O
in	O
idiomatic	O
C++	B-Language
and	O
released	O
as	O
open	O
source	O
under	O
the	O
Boost	O
Software	O
License	O
,	O
which	O
allows	O
usage	O
in	O
commercial	O
applications	O
.	O
</s>
