<s>
ICL	B-Device
Distributed	I-Device
Array	I-Device
Processor	I-Device
(	O
DAP	O
)	O
.	O
</s>
<s>
The	O
DAP	O
had	O
a	O
Single	B-Device
Instruction	I-Device
Multiple	I-Device
Data	I-Device
(	O
SIMD	B-Device
)	O
architecture	O
with	O
64x64	O
single	O
bit	O
processors	O
.	O
</s>
<s>
DAP	B-General_Concept
FORTRAN	I-General_Concept
had	O
the	O
following	O
major	O
features	O
:	O
</s>
<s>
However	O
,	O
DAP	B-General_Concept
FORTRAN	I-General_Concept
fell	O
between	O
two	O
conflicting	O
objectives	O
.	O
</s>
<s>
But	O
also	O
had	O
to	O
be	O
accessible	O
to	O
the	O
scientific	O
computing	O
community	O
whose	O
primary	O
language	O
,	O
with	O
a	O
design	O
closely	O
tied	O
to	O
serial	O
architectures	O
,	O
was	O
FORTRAN	B-Application
.	O
</s>
<s>
The	O
dialect	O
used	O
was	O
ICL	O
's	O
2900-series	O
FORTRAN	B-Application
which	O
was	O
based	O
on	O
an	O
early	O
version	O
of	O
the	O
FORTRAN	B-Application
77	O
standard	O
and	O
had	O
mismatches	O
with	O
both	O
FORTRAN	B-Application
77	O
and	O
the	O
older	O
FORTRAN	B-Application
66	O
standard	O
.	O
</s>
<s>
DAP	B-General_Concept
FORTRAN	I-General_Concept
was	O
significantly	O
different	O
from	O
either	O
standard	O
FORTRAN	B-Application
and	O
the	O
machine	O
was	O
not	O
capable	O
of	O
accepting	O
or	O
optimising	O
standard	O
FORTRAN	B-Application
programs	O
.	O
</s>
<s>
On	O
the	O
other	O
hand	O
,	O
compared	O
with	O
other	O
contemporary	O
languages	O
which	O
were	O
by	O
design	O
extensible	O
(	O
notably	O
ALGOL-68	B-Language
)	O
,	O
FORTRAN	B-Application
was	O
less	O
than	O
well	O
suited	O
to	O
this	O
task	O
.	O
</s>
<s>
FORTRAN	B-Application
77	O
and	O
had	O
more	O
flexible	O
indexing	O
.	O
</s>
