<s>
Parallel	O
Specification	O
and	O
Implementation	O
Language	O
(	O
ParaSail	B-Application
)	O
is	O
an	O
object-oriented	B-Language
parallel	O
programming	O
language	O
.	O
</s>
<s>
ParaSail	B-Application
uses	O
a	O
pointer-free	O
programming	O
model	O
,	O
where	O
objects	O
can	O
grow	O
and	O
shrink	O
,	O
and	O
value	O
semantics	O
are	O
used	O
for	O
assignment	O
.	O
</s>
<s>
It	O
has	O
no	O
global	O
garbage	B-General_Concept
collected	I-General_Concept
heap	O
.	O
</s>
<s>
Instead	O
,	O
region-based	B-General_Concept
memory	I-General_Concept
management	I-General_Concept
is	O
used	O
throughout	O
.	O
</s>
<s>
Assertions	O
,	O
preconditions	O
,	O
postconditions	O
,	O
class	B-Application
invariants	I-Application
,	O
etc.	O
,	O
are	O
part	O
of	O
the	O
standard	O
syntax	B-Application
,	O
using	O
a	O
Hoare-like	O
notation	O
.	O
</s>
<s>
Any	O
possible	O
race	B-Operating_System
conditions	I-Operating_System
are	O
detected	O
at	O
compile	B-Application
time	I-Application
.	O
</s>
<s>
Initial	O
design	O
of	O
ParaSail	B-Application
began	O
in	O
September	O
2009	O
,	O
by	O
S	O
.	O
Tucker	O
Taft	O
.	O
</s>
<s>
Both	O
an	O
interpreter	B-Application
using	O
the	O
ParaSail	B-Application
virtual	B-Architecture
machine	I-Architecture
,	O
and	O
an	O
LLVM-based	O
ParaSail	B-Application
compiler	B-Language
are	O
available	O
.	O
</s>
<s>
Work	B-Operating_System
stealing	I-Operating_System
is	O
used	O
for	O
scheduling	O
ParaSail	B-Application
's	O
light-weight	O
threads	B-Operating_System
.	O
</s>
<s>
The	O
latest	O
version	O
can	O
be	O
downloaded	O
from	O
the	O
ParaSail	B-Application
website	O
.	O
</s>
<s>
The	O
syntax	B-Application
of	O
ParaSail	B-Application
is	O
similar	O
to	O
Modula	B-Language
,	O
but	O
with	O
a	O
class-and-interface-based	O
object-oriented	B-Language
programming	I-Language
model	O
more	O
similar	O
to	O
Java	B-Language
or	O
C#	B-Application
.	O
</s>
<s>
More	O
recently	O
,	O
the	O
parallel	O
constructs	O
of	O
ParaSail	B-Application
have	O
been	O
adapted	O
to	O
other	O
syntaxes	B-Application
,	O
to	O
produce	O
Java-like	O
,	O
Python-like	O
,	O
and	O
Ada-like	O
parallel	O
languages	O
,	O
dubbed	O
,	O
respectively	O
,	O
Javallel	O
,	O
Parython	O
,	O
and	O
Sparkel	O
(	O
named	O
after	O
the	O
Ada	B-Language
subset	O
SPARK	B-Language
on	O
which	O
it	O
is	O
based	O
)	O
.	O
</s>
<s>
Compilers	B-Language
and	O
interpreters	B-Application
for	O
these	O
languages	O
are	O
included	O
with	O
the	O
ParaSail	B-Application
implementation	O
.	O
</s>
<s>
The	O
following	O
is	O
a	O
Hello	O
world	O
program	O
in	O
ParaSail	B-Application
:	O
</s>
