<s>
Gable	B-Algorithm
CAD	I-Algorithm
,	O
or	O
Gable	O
4D	O
Series	O
,	O
was	O
a	O
British	O
architectural	O
computer-aided	B-Application
design	I-Application
package	O
initially	O
developed	O
in	O
the	O
early	O
1980s	O
.	O
</s>
<s>
Gable	B-Algorithm
CAD	I-Algorithm
was	O
developed	O
at	O
the	O
University	O
of	O
Sheffield	O
in	O
the	O
mid-1980s	O
under	O
the	O
leadership	O
of	O
Professor	O
Bryan	O
Lawson	O
.	O
</s>
<s>
It	O
was	O
spun	O
out	O
into	O
Gable	B-Algorithm
CAD	I-Algorithm
Systems	O
Limited	O
(	O
incorporated	O
in	O
1984	O
)	O
and	O
retained	O
links	O
with	O
the	O
university	O
until	O
its	O
demise	O
in	O
1996	O
when	O
a	O
court	O
order	O
was	O
made	O
for	O
compulsory	O
winding	O
up	O
.	O
</s>
<s>
An	O
early	O
building	B-Architecture
information	I-Architecture
modeling	I-Architecture
application	O
,	O
Gable	B-Algorithm
CAD	I-Algorithm
was	O
an	O
advanced	O
2D	O
and	O
3D	O
design	O
package	O
with	O
different	O
modules	O
,	O
and	O
was	O
operated	O
via	O
a	O
Windows-style	O
interface	O
and	O
mouse	O
running	O
on	O
UNIX	B-Application
.	O
</s>
<s>
The	O
assets	O
of	O
the	O
company	O
were	O
acquired	O
by	O
Auxer	O
in	O
1997	O
and	O
aimed	O
to	O
complete	O
the	O
conversion	O
of	O
Gable	B-Algorithm
CAD	I-Algorithm
to	O
Windows	B-Device
NT	I-Device
but	O
this	O
does	O
not	O
appear	O
to	O
have	O
ever	O
been	O
released	O
.	O
</s>
