<s>
Irvine	B-Language
Dataflow	I-Language
(	O
Id	B-Language
)	O
is	O
a	O
general-purpose	O
parallel	O
programming	O
language	O
,	O
started	O
at	O
the	O
University	O
of	O
California	O
at	O
Irvine	O
in	O
1975	O
by	O
Arvind	O
and	O
K	O
.	O
P	O
.	O
Gostelow	O
.	O
</s>
<s>
Arvind	O
continued	O
work	O
with	O
Id	B-Language
at	O
MIT	O
into	O
the	O
1990s	O
.	O
</s>
<s>
The	O
major	O
subset	O
of	O
Id	B-Language
is	O
a	O
purely	O
functional	O
programming	O
language	O
with	O
non-strict	O
semantics	O
.	O
</s>
<s>
Features	O
include	O
:	O
higher-order	B-Language
functions	I-Language
,	O
a	O
Milner-style	O
statically	O
type-checked	O
polymorphic	O
type	O
system	O
with	O
overloading	O
,	O
user	O
defined	O
types	O
and	O
pattern	O
matching	O
,	O
and	O
prefix	O
and	O
infix	O
operators	O
.	O
</s>
<s>
It	O
led	O
to	O
the	O
development	O
of	O
pH	O
,	O
a	O
parallel	O
dialect	O
of	O
Haskell	B-Language
.	O
</s>
<s>
Id	B-Language
programs	O
are	O
fine	O
grained	O
implicitly	B-Operating_System
parallel	I-Operating_System
.	O
</s>
<s>
The	O
MVar	O
synchronisation	O
variable	O
abstraction	O
in	O
Haskell	B-Language
is	O
based	O
on	O
Id	B-Language
's	O
M-structures	O
.	O
</s>
<s>
Id	B-Language
supports	O
algebraic	O
datatypes	O
,	O
similar	O
to	O
ML	O
,	O
Haskell	B-Language
,	O
or	O
Miranda	O
:	O
</s>
<s>
typeof	O
id	B-Language
=	O
*	O
0	O
->	O
*	O
0	O
;	O
</s>
<s>
def	O
id	B-Language
x	O
=	O
x	O
;	O
</s>
<s>
A	O
function	O
which	O
uses	O
an	O
array	O
comprehension	O
to	O
compute	O
the	O
first	O
Fibonacci	B-Algorithm
numbers	I-Algorithm
:	O
</s>
<s>
Id	B-Language
's	O
lenient	O
evaluation	O
strategy	O
allows	O
cyclic	O
datastructures	O
by	O
default	O
.	O
</s>
<s>
The	O
pHluid	O
system	O
was	O
a	O
research	O
implementation	O
of	O
Id	B-Language
programming	O
language	O
,	O
with	O
future	O
plans	O
for	O
a	O
front-end	O
for	O
pH	O
,	O
a	O
parallel	O
dialect	O
of	O
the	O
Haskell	B-Language
programming	I-Language
language	I-Language
,	O
implemented	O
at	O
Digital	O
's	O
Cambridge	O
Research	O
Laboratory	O
.	O
</s>
